diff --git a/02_activities/assignments/assignment_1.ipynb b/02_activities/assignments/assignment_1.ipynb
index 625be0241..495f91804 100644
--- a/02_activities/assignments/assignment_1.ipynb
+++ b/02_activities/assignments/assignment_1.ipynb
@@ -56,13 +56,34 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 28,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 28,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "# For testing purposes, we will write our code in the function\n",
     "def anagram_checker(word_a, word_b):\n",
     "  # Your code here\n",
+    "  #word_a = word_a.lower()\n",
+    "  #word_b = word_b.lower()\n",
+    "  a = sorted(word_a.lower())\n",
+    "  b = sorted(word_b.lower())\n",
+    "  if a == b:\n",
+    "    return True\n",
+    "  else:\n",
+    "    return False\n",
+    "\n",
+    "\n",
     "\n",
     "# Run your code to check using the words below:\n",
     "anagram_checker(\"Silent\", \"listen\")"
@@ -70,18 +91,40 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 29,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "False"
+      ]
+     },
+     "execution_count": 29,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "anagram_checker(\"Silent\", \"Night\")"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 30,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 30,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "anagram_checker(\"night\", \"Thing\")"
    ]
@@ -97,12 +140,40 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 31,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 31,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "def anagram_checker(word_a, word_b, is_case_sensitive):\n",
     "  # Modify your existing code here\n",
+    "  a = sorted(word_a)\n",
+    "  b = sorted(word_b)\n",
+    "  if is_case_sensitive:\n",
+    "    if a == b:\n",
+    "      return True\n",
+    "    else:\n",
+    "      return False\n",
+    "  elif is_case_sensitive == False:\n",
+    "    a = sorted(word_a.lower())\n",
+    "    b = sorted(word_b.lower())\n",
+    "    if a == b:\n",
+    "      return True\n",
+    "    else:\n",
+    "      return False\n",
+    "\n",
+    "    \n",
+    "\n",
     "\n",
     "# Run your code to check using the words below:\n",
     "anagram_checker(\"Silent\", \"listen\", False) # True"
@@ -110,9 +181,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 32,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "False"
+      ]
+     },
+     "execution_count": 32,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "anagram_checker(\"Silent\", \"Listen\", True) # False"
    ]
@@ -130,7 +212,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "new-learner",
+   "display_name": "python-env",
    "language": "python",
    "name": "python3"
   },
@@ -144,7 +226,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.8"
+   "version": "3.11.14"
   }
  },
  "nbformat": 4,
diff --git a/02_activities/assignments/assignment_2.ipynb b/02_activities/assignments/assignment_2.ipynb
index fdaead283..a21332861 100644
--- a/02_activities/assignments/assignment_2.ipynb
+++ b/02_activities/assignments/assignment_2.ipynb
@@ -72,11 +72,138 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 5,
    "metadata": {
     "id": "n0m48JsS-nMC"
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "0,0,0,1,3,4,6,5,2,7,7,8,6,11,5,6,10,4,5,9,15,15,14,13,14,12,10,9,8,8,6,6,6,6,5,4,2,1,1,0\n",
+      "\n",
+      "0,0,2,2,4,2,1,7,5,7,3,6,10,5,5,14,14,9,11,10,5,5,5,15,6,6,10,13,6,8,3,5,7,7,3,2,2,0,2,1\n",
+      "\n",
+      "0,1,2,3,2,1,4,1,8,7,4,5,10,3,11,5,11,8,18,4,17,9,5,6,15,14,11,5,6,4,7,2,5,6,4,5,4,0,2,1\n",
+      "\n",
+      "0,0,0,0,1,2,4,7,3,5,8,7,5,13,10,7,11,8,18,6,13,4,10,13,5,5,4,3,8,9,2,3,2,3,5,3,1,3,1,1\n",
+      "\n",
+      "0,1,0,2,1,2,3,6,5,2,9,3,5,12,9,5,8,11,9,4,19,19,15,9,6,12,9,3,6,2,9,9,8,5,3,5,3,0,2,1\n",
+      "\n",
+      "0,0,1,3,4,4,2,2,6,3,2,9,4,11,12,8,6,8,8,7,18,11,13,13,10,5,7,11,3,6,9,6,4,5,1,4,1,0,0,0\n",
+      "\n",
+      "0,1,0,3,2,3,2,2,4,6,4,11,11,8,3,9,11,7,12,16,10,5,17,8,11,15,6,8,11,10,6,9,4,3,3,3,1,3,1,1\n",
+      "\n",
+      "0,1,2,1,4,1,2,7,2,2,8,9,5,6,12,12,6,14,6,5,12,11,11,5,10,7,6,6,10,2,4,5,8,3,5,3,3,0,0,1\n",
+      "\n",
+      "0,0,1,2,2,1,4,2,7,4,10,6,4,3,6,5,8,13,8,8,12,4,13,4,13,4,14,5,12,10,6,3,2,1,5,3,4,3,2,0\n",
+      "\n",
+      "0,1,1,1,4,2,1,3,5,3,2,3,11,3,4,5,14,4,5,8,18,18,13,5,11,4,13,12,11,4,10,9,3,3,6,3,2,0,2,0\n",
+      "\n",
+      "0,1,0,0,2,3,5,2,5,8,4,7,7,8,5,5,8,15,14,4,10,12,8,14,11,14,5,13,4,6,8,3,6,5,5,2,4,2,2,1\n",
+      "\n",
+      "0,1,2,3,2,5,6,4,2,4,6,9,6,9,6,6,14,11,6,18,6,13,18,7,15,13,3,12,8,8,5,2,5,7,4,2,2,3,2,0\n",
+      "\n",
+      "0,0,0,1,4,1,4,1,7,7,8,7,7,4,9,3,8,17,17,9,13,19,5,10,8,7,5,3,7,4,6,5,4,1,5,2,1,0,0,0\n",
+      "\n",
+      "0,0,2,1,1,4,5,7,8,5,5,3,6,9,7,8,10,10,13,19,18,15,4,11,6,4,8,11,7,5,4,3,7,3,5,4,4,0,1,0\n",
+      "\n",
+      "0,1,0,3,4,3,3,7,6,8,4,11,6,10,10,7,12,9,11,17,10,16,17,4,5,8,4,8,10,8,5,5,4,7,4,2,3,1,0,1\n",
+      "\n",
+      "0,0,0,3,1,3,5,1,6,5,3,4,8,11,11,3,4,12,14,17,7,9,4,8,8,15,3,12,9,10,6,6,3,3,2,5,4,3,1,0\n",
+      "\n",
+      "0,1,0,0,4,5,5,6,8,9,2,11,4,13,5,15,13,5,13,7,7,5,12,4,12,10,7,4,4,10,10,7,8,2,4,3,4,0,1,1\n",
+      "\n",
+      "0,0,2,0,2,3,2,4,4,3,10,5,8,9,8,12,15,10,9,4,17,5,13,12,15,5,8,10,9,5,3,9,4,2,6,4,2,0,1,1\n",
+      "\n",
+      "0,0,2,1,3,4,3,2,7,3,5,7,9,8,6,3,7,12,13,15,20,7,5,17,13,5,5,13,8,6,8,4,5,1,1,5,3,2,1,1\n",
+      "\n",
+      "0,0,0,3,4,2,2,5,2,8,6,10,7,13,7,11,10,6,12,14,8,7,9,12,11,5,5,13,7,7,4,9,4,7,2,1,2,3,0,1\n",
+      "\n",
+      "0,1,1,2,4,1,6,3,8,8,8,9,8,7,12,9,5,7,9,11,8,7,11,6,8,13,14,5,3,7,10,6,8,6,5,4,4,2,0,0\n",
+      "\n",
+      "0,0,2,3,3,1,5,3,3,6,8,4,12,8,12,11,14,9,5,7,11,13,13,4,13,12,14,6,7,5,3,4,3,1,1,3,4,3,2,1\n",
+      "\n",
+      "0,1,2,3,2,4,1,3,6,2,10,11,7,3,9,6,11,15,4,19,16,9,18,4,6,12,6,5,9,6,9,5,2,4,6,2,1,3,2,1\n",
+      "\n",
+      "0,1,0,3,4,5,6,5,4,3,3,9,9,13,10,12,14,7,15,16,15,7,15,6,9,7,10,9,4,8,2,6,8,2,6,4,1,3,0,1\n",
+      "\n",
+      "0,1,0,1,4,2,2,7,7,8,7,11,9,5,5,6,14,7,6,14,8,17,5,13,8,6,13,13,10,10,4,2,2,7,6,3,4,1,1,1\n",
+      "\n",
+      "0,0,2,2,2,4,3,7,6,9,10,10,3,5,14,14,9,15,16,17,15,10,4,14,12,6,8,12,4,3,6,4,8,3,2,5,1,1,2,1\n",
+      "\n",
+      "0,1,0,2,3,5,3,6,3,7,6,5,11,7,14,9,7,8,6,4,12,5,12,6,5,6,3,7,3,8,7,7,4,7,5,3,2,2,2,0\n",
+      "\n",
+      "0,1,1,0,2,3,4,1,3,8,8,8,7,6,6,11,13,9,9,9,10,14,8,5,13,4,5,3,3,2,9,2,2,6,5,2,1,1,1,1\n",
+      "\n",
+      "0,0,2,3,4,5,2,3,8,6,6,5,10,8,7,15,14,6,6,6,8,7,12,10,7,12,5,8,12,11,4,5,5,6,6,2,2,2,0,0\n",
+      "\n",
+      "0,0,1,1,3,2,4,3,4,8,4,3,4,13,11,14,6,6,15,16,10,19,10,15,14,13,7,9,4,2,6,8,2,1,1,5,4,2,1,1\n",
+      "\n",
+      "0,1,0,2,2,2,3,1,4,9,9,2,5,6,13,7,13,8,17,15,7,13,11,13,9,5,7,13,10,5,9,3,8,4,6,1,2,3,1,1\n",
+      "\n",
+      "0,0,1,1,1,3,5,4,2,2,6,10,9,9,5,5,5,11,18,18,6,14,12,8,15,5,4,4,11,4,5,7,3,4,6,3,2,1,2,1\n",
+      "\n",
+      "0,1,0,2,2,5,2,3,2,9,4,2,12,11,6,4,9,11,4,18,19,5,4,6,7,7,10,13,9,2,8,4,3,5,4,2,3,0,0,1\n",
+      "\n",
+      "0,1,1,3,2,5,2,5,2,2,9,5,10,11,14,14,15,8,4,13,6,13,11,13,9,5,10,12,8,8,2,2,2,2,6,5,3,1,1,0\n",
+      "\n",
+      "0,1,1,2,2,3,2,7,7,8,7,9,4,5,3,9,8,8,11,19,5,16,13,7,16,12,8,7,11,8,3,4,6,1,1,1,4,3,1,0\n",
+      "\n",
+      "0,1,1,2,4,4,4,4,4,5,5,11,3,5,6,13,8,14,5,14,9,6,9,15,9,6,4,7,4,6,7,2,4,4,4,3,1,2,0,1\n",
+      "\n",
+      "0,0,2,1,1,1,4,7,3,2,9,7,11,4,5,4,16,16,9,4,16,5,16,17,4,9,6,4,10,11,9,9,6,4,6,1,1,0,2,1\n",
+      "\n",
+      "0,0,1,1,3,1,4,4,4,7,9,2,3,11,5,10,12,8,6,6,16,13,10,6,7,10,9,7,4,6,5,7,4,3,6,3,1,2,1,1\n",
+      "\n",
+      "0,0,1,0,3,3,1,7,4,8,8,2,12,5,12,15,4,12,12,13,20,8,14,5,14,15,6,5,4,4,6,9,5,1,2,1,4,2,0,0\n",
+      "\n",
+      "0,1,0,1,4,2,2,5,4,7,3,11,3,12,11,6,4,15,15,16,8,4,16,15,8,7,12,10,5,5,9,5,8,1,3,4,4,2,0,0\n",
+      "\n",
+      "0,0,1,2,3,5,4,6,7,7,2,8,9,6,4,9,7,14,6,11,17,16,13,12,16,12,6,5,8,3,8,5,3,1,4,3,1,2,0,1\n",
+      "\n",
+      "0,1,2,3,1,3,5,2,2,4,5,9,12,4,7,13,15,4,15,12,15,18,5,16,4,15,8,9,4,9,2,2,6,1,2,3,3,2,1,0\n",
+      "\n",
+      "0,1,1,1,2,2,6,3,5,2,10,4,7,13,3,5,14,10,9,16,18,11,15,5,9,14,8,4,3,3,2,8,4,1,4,1,1,1,2,1\n",
+      "\n",
+      "0,1,1,2,1,1,5,3,5,4,9,8,11,3,5,15,6,6,8,19,8,15,18,10,12,10,10,6,9,3,10,9,7,6,3,3,1,2,0,0\n",
+      "\n",
+      "0,1,2,0,2,1,4,1,5,7,3,2,5,6,6,9,4,17,11,10,16,12,17,13,10,7,13,6,8,9,8,3,8,2,6,1,1,3,2,0\n",
+      "\n",
+      "0,0,1,2,3,2,3,5,3,9,8,4,3,9,8,14,6,15,13,4,17,8,9,17,9,5,6,8,10,6,3,7,4,4,3,1,1,0,2,0\n",
+      "\n",
+      "0,1,1,0,1,1,2,7,8,6,4,4,9,3,10,14,14,11,6,8,18,5,13,10,4,5,3,12,9,7,8,8,2,4,3,4,3,2,1,1\n",
+      "\n",
+      "0,0,0,1,1,1,4,2,5,4,10,9,7,9,3,15,12,6,14,17,16,18,5,8,10,12,10,11,11,8,10,9,8,5,1,3,4,3,0,1\n",
+      "\n",
+      "0,0,0,2,4,4,1,2,7,4,7,7,10,7,14,9,6,17,8,8,8,9,6,15,15,12,10,9,11,6,4,7,7,2,4,1,4,1,1,1\n",
+      "\n",
+      "0,1,1,1,1,1,1,3,3,4,10,2,6,7,12,8,6,5,11,19,8,10,6,9,15,7,13,7,10,3,3,8,2,2,1,3,2,0,2,1\n",
+      "\n",
+      "0,1,1,2,2,4,5,3,4,6,2,3,10,3,7,15,10,8,12,7,13,12,9,7,8,4,9,8,12,10,6,2,4,3,4,3,3,1,0,0\n",
+      "\n",
+      "0,0,0,1,3,2,6,5,6,6,7,8,3,13,5,12,4,12,10,18,13,7,7,4,15,13,5,8,10,3,7,6,3,4,5,5,2,1,1,0\n",
+      "\n",
+      "0,0,1,0,2,2,3,3,4,8,5,2,8,7,9,7,9,4,7,4,6,11,10,10,8,14,4,5,3,10,6,5,8,3,6,2,3,3,2,0\n",
+      "\n",
+      "0,0,2,2,2,1,6,4,4,2,2,3,7,4,8,15,8,12,17,10,17,8,13,13,8,7,3,9,6,2,3,4,8,2,1,1,2,1,2,0\n",
+      "\n",
+      "0,0,0,1,4,2,1,4,8,7,7,10,12,5,4,4,12,7,18,9,16,19,11,7,14,8,11,11,10,9,9,8,4,7,6,5,2,2,1,1\n",
+      "\n",
+      "0,0,2,2,4,2,3,6,4,5,4,2,5,4,11,13,4,10,16,16,6,16,7,14,5,7,11,10,12,10,8,6,4,1,2,2,4,1,2,0\n",
+      "\n",
+      "0,1,0,2,2,1,6,2,2,2,9,5,9,12,5,12,10,13,9,4,17,14,5,10,12,3,13,4,9,8,8,6,7,4,4,5,4,0,2,0\n",
+      "\n",
+      "0,0,2,0,4,3,5,5,6,9,4,5,4,3,10,3,7,11,12,10,19,16,17,14,16,9,12,5,10,11,6,7,7,3,3,1,1,0,2,0\n",
+      "\n",
+      "0,0,0,3,3,1,5,7,7,7,6,8,7,6,10,14,6,12,5,15,20,18,14,17,14,11,13,10,9,5,5,5,5,7,1,5,3,2,2,0\n",
+      "\n",
+      "0,1,2,0,4,5,6,6,2,5,10,10,3,7,13,9,5,16,6,18,15,10,13,11,12,15,10,12,3,8,8,7,5,6,2,5,2,3,2,0\n",
+      "\n"
+     ]
+    }
+   ],
    "source": [
     "all_paths = [\n",
     "  \"../../05_src/data/assignment_2_data/inflammation_01.csv\",\n",
@@ -93,10 +220,12 @@
     "  \"../../05_src/data/assignment_2_data/inflammation_12.csv\"\n",
     "]\n",
     "\n",
-    "with open(all_paths[0], 'r') as f:\n",
+    "with open(all_paths[1], 'r') as f:\n",
     "    # YOUR CODE HERE: Use the readline() or readlines() method to read the .csv file into a variable\n",
-    "    \n",
-    "    # YOUR CODE HERE: Iterate through the variable using a for loop and print each row for inspection"
+    "    file_lines = f.readlines()\n",
+    "    # YOUR CODE HERE: Iterate through the variable using a for loop and print each row for inspection\n",
+    "    for line in file_lines:\n",
+    "        print(line)"
    ]
   },
   {
@@ -141,16 +270,31 @@
     "def patient_summary(file_path, operation):\n",
     "    data = np.loadtxt(fname=file_path, delimiter=',') # Load the data from the file\n",
     "    ax = 1  # This specifies that the operation should be done for each row (patient)\n",
+    "    #summary_values = [] # created empty list to use in append method\n",
     "\n",
     "    # Implement the specific operation based on the 'operation' argument\n",
     "    if operation == 'mean':\n",
     "        # YOUR CODE HERE: Calculate the mean (average) number of flare-ups for each patient\n",
+    "        summary_values = data.mean(axis = ax) # calculating using axis on multi dimention array\n",
+    "        \n",
+    "        # below is another way of calculating using loop\n",
+    "        '''for patient in data: \n",
+    "            avg = patient.mean()\n",
+    "            summary_values.append(avg)'''\n",
     "\n",
     "    elif operation == 'max':\n",
     "        # YOUR CODE HERE: Calculate the maximum number of flare-ups experienced by each patient\n",
+    "        summary_values = data.max(axis = ax)\n",
+    "        '''for patient in data:\n",
+    "            maximum = patient.max()\n",
+    "            summary_values.append(maximum)'''\n",
     "\n",
     "    elif operation == 'min':\n",
     "        # YOUR CODE HERE: Calculate the minimum number of flare-ups experienced by each patient\n",
+    "        summary_values = data.min(axis = ax)\n",
+    "        '''for patient in data:\n",
+    "            minimum = patient.min()\n",
+    "            summary_values.append(minimum)'''\n",
     "\n",
     "    else:\n",
     "        # If the operation is not one of the expected values, raise an error\n",
@@ -161,15 +305,27 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 36,
    "metadata": {
     "id": "3TYo0-1SDLrd"
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.\n",
+      " 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.\n",
+      " 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.]\n",
+      "60\n"
+     ]
+    }
+   ],
    "source": [
     "# Test it out on the data file we read in and make sure the size is what we expect i.e., 60\n",
     "# Your output for the first file should be 60\n",
-    "data_min = patient_summary(all_paths[0], 'min')\n",
+    "data_min = patient_summary(all_paths[2], 'min')\n",
+    "print(data_min)\n",
     "print(len(data_min))"
    ]
   },
@@ -228,7 +384,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 42,
    "metadata": {
     "id": "_svDiRkdIwiT"
    },
@@ -251,7 +407,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 52,
    "metadata": {
     "id": "LEYPM5v4JT0i"
    },
@@ -261,19 +417,27 @@
     "\n",
     "def detect_problems(file_path):\n",
     "  #YOUR CODE HERE: Use patient_summary() to get the means and check_zeros() to check for zeros in the means\n",
-    "\n",
-    "  return"
+    "  a = check_zeros(patient_summary(file_path, 'mean')) # calling the function within function and assigning the result of check_zeros to a to return\n",
+    "  return a"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 53,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "True\n"
+     ]
+    }
+   ],
    "source": [
     "# Test out your code here\n",
     "# Your output for the first file should be False\n",
-    "print(detect_problems(all_paths[0]))"
+    "print(detect_problems(all_paths[7]))"
    ]
   },
   {
@@ -314,7 +478,8 @@
    "provenance": []
   },
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "python-env",
+   "language": "python",
    "name": "python3"
   },
   "language_info": {
@@ -327,7 +492,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.8"
+   "version": "3.11.14"
   }
  },
  "nbformat": 4,
diff --git a/1_Functions.ipynb b/1_Functions.ipynb
new file mode 100644
index 000000000..eb305b1b9
--- /dev/null
+++ b/1_Functions.ipynb
@@ -0,0 +1,214 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "e8686024",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def divide(divident,divisor):\n",
+    "    result = divident / divisor\n",
+    "    return result\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "dca148b0",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "2.0"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "divide(10,5)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "92d87af4",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "0.65\n",
+      "0.4\n"
+     ]
+    }
+   ],
+   "source": [
+    "# default value assignment\n",
+    "\n",
+    "def calc_sales_tax(price, tax_rate=0.13):\n",
+    "    sales_tax = price * tax_rate\n",
+    "    return sales_tax\n",
+    "\n",
+    "print(calc_sales_tax(5))\n",
+    "print(calc_sales_tax(5,0.08)) # this overrides the default value\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "16cb9446",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "256.0\n",
+      "262.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "# keyword arguments, position of the supplied parameters while calling the function is important\n",
+    "# docstring using 3 single quote \n",
+    "def calc_total_bill(price, tax_rate=0.13,tip_rate=0.15):\n",
+    "    '''Calculate total bill with tax and tip'''\n",
+    "    tax = price * tax_rate\n",
+    "    tip = price * tip_rate\n",
+    "    total = price + tax + tip\n",
+    "    return total\n",
+    "\n",
+    "print(calc_total_bill(200))\n",
+    "\n",
+    "print(calc_total_bill(200,tip_rate=0.18))  # position of argument matter so kerword argument is used"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "8b5db084",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Help on function calc_total_bill in module __main__:\n",
+      "\n",
+      "calc_total_bill(price, tax_rate=0.13, tip_rate=0.15)\n",
+      "    Calculate total bill with tax and tip\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "# docstring - creating help text for functions\n",
+    "\n",
+    "help(calc_total_bill)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c127b2b6",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# variable scope\n",
+    "# variables within functions are local - only access it within that function and not outside\n",
+    "# You can explicitely define global variables within function using the keyword global"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "75086155",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calc_total_bill(price, tax_rate=0.13, tip_rate=\"standard\"):\n",
+    "\n",
+    "    tip_presets = {\n",
+    "\n",
+    "        \"low\": 0.10,\n",
+    "\n",
+    "        \"standard\": 0.15,\n",
+    "\n",
+    "        \"high\": 0.20\n",
+    "\n",
+    "    }\n",
+    "\n",
+    " \n",
+    "\n",
+    "    # only convert if it's one of the known presets\n",
+    "\n",
+    "    if tip_rate in tip_presets:\n",
+    "\n",
+    "        tip_rate = tip_presets[tip_rate]\n",
+    "\n",
+    " \n",
+    "\n",
+    "    tax = price * tax_rate\n",
+    "\n",
+    "    tip = price * tip_rate\n",
+    "\n",
+    "    total = price + tax + tip\n",
+    "\n",
+    "    return total"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "4ce3079b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "50\n",
+      "51\n"
+     ]
+    }
+   ],
+   "source": [
+    "# input function - always takes in value as string\n",
+    "\n",
+    "age = input('How old are you?')\n",
+    "\n",
+    "print(age)\n",
+    "\n",
+    "age_next_bday = (int(age) + 1)\n",
+    "print(age_next_bday)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "python-env",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.14"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/2_Method.ipynb b/2_Method.ipynb
new file mode 100644
index 000000000..7984fc760
--- /dev/null
+++ b/2_Method.ipynb
@@ -0,0 +1,238 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b7d75098",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'I AM NOT YELLLING'"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# method is a function that only works for a specific data type\n",
+    "# syntax is object.method_name(parameters)\n",
+    "# https://docs.python.org/3/library/stdtypes.html#string-methods\n",
+    "\n",
+    "\n",
+    "\"I am not yellling\".upper()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "eafa0878",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "0"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "\"this string is unusual\".count('e')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "23c7fbdc",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "'file_name.csv'.endswith('.csv')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "707947f1",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'long_file_name_with_spaces.csv'"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "'long file name with spaces.csv'.replace(' ','_')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "129be9c7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "first_name = 'Ada'\n",
+    "last_name = 'Lovelace'"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "07e95144",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "\"Ada Lovelace's initials are A. L.\""
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# formating string methods\n",
+    "# .format() string method\n",
+    "\n",
+    "'Ada Lovelace\\'s initials are {}. {}.'.format(first_name[0], last_name[0])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "8a439816",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'My favourite day of the week is Monday.'"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "day_of_week = 'Monday'\n",
+    "'My favourite day of the week is {}.'.format(day_of_week)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "7b2c4093",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "\"Ada Lovelace's initials are A. L.\""
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# f-string method\n",
+    "f'Ada Lovelace\\'s initials are {first_name[0]}. {last_name[0]}.'\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "5f6c3050",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'My favourite sport is soccer'"
+      ]
+     },
+     "execution_count": 14,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "favourite_sport = 'soccer'\n",
+    "\n",
+    "f'My favourite sport is {favourite_sport}'"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a3268d13",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "1"
+      ]
+     },
+     "execution_count": 15,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# you can nest methods\n",
+    "'first_name'.upper().count('F') "
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "python-env",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.14"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/3_Strings.ipynb b/3_Strings.ipynb
new file mode 100644
index 000000000..ee5c82eb5
--- /dev/null
+++ b/3_Strings.ipynb
@@ -0,0 +1,174 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "36f2bfdb",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Mashed Potatoes\n"
+     ]
+    }
+   ],
+   "source": [
+    "# you can use double or single quotes to define string\n",
+    "\n",
+    "favourite_food = 'Mashed Potatoes'\n",
+    "print(favourite_food)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "356b9482",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "let's see if this works\n"
+     ]
+    }
+   ],
+   "source": [
+    "a = \"let's see if this works\"\n",
+    "print(a)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "6804df00",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'I am a multiline string\\nI span over many\\nmany\\nmany\\nlines'"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# multiline string can be assigned using 3 single/double quotes\n",
+    "# \\n in the result means new line, \\t tab, \\' single quote, \\\" double quote\n",
+    "'''I am a multiline string\n",
+    "I span over many\n",
+    "many\n",
+    "many\n",
+    "lines'''"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "94e77062",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "this is \t a tab\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"this is \\t a tab\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "ccfad329",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "this is \\ a backslash\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"this is \\\\ a backslash\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "b9241c1e",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "this is \" a double quote\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"this is \\\" a double quote\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "6b1f63c8",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "listic\n"
+     ]
+    }
+   ],
+   "source": [
+    "word1 = \"supercalifragilisticexpialidocious\"\n",
+    "\n",
+    "n = len(word1)\n",
+    "\n",
+    "middle6 = word1[n//2 - 3 : n//2 + 3]\n",
+    "\n",
+    "print(middle6)\n",
+    "\n",
+    "#long_word[int((len(long_word)/2))-3:int((len(long_word)/2))+3] \n",
+    "# Length = 34 letters,middle_letters = word[17-3 : 17+3]\n",
+    "#print(middle_letters)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "python-env",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.14"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/4_operators.ipynb b/4_operators.ipynb
new file mode 100644
index 000000000..2c8df08b2
--- /dev/null
+++ b/4_operators.ipynb
@@ -0,0 +1,201 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "67c28fb5",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "False"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Logic operators\n",
+    "\n",
+    "# not : negate the truth value of the statement\n",
+    "\n",
+    "not True\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "ce8810cc",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 2,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "not False"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "f1c29595",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "False"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "not (3 == 3)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "260026c9",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "True\n",
+      "False\n",
+      "False\n",
+      "False\n"
+     ]
+    }
+   ],
+   "source": [
+    "# and operator - going to check if the statements on both sides are true\n",
+    "\n",
+    "# T T = T\n",
+    "# F T = F\n",
+    "# T F = F\n",
+    "# F F = F\n",
+    "\n",
+    "print(True and True)\n",
+    "print(False and True)\n",
+    "print(True and False)\n",
+    "print(False and False)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "862858ed",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "(7 == 7.0) and (32 > 9)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "6a58995e",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "True\n",
+      "True\n",
+      "True\n",
+      "False\n"
+     ]
+    }
+   ],
+   "source": [
+    "# or operator checkes if one of the statements are true\n",
+    "\n",
+    "print(True or True)\n",
+    "print(False or True)\n",
+    "print(True or False)\n",
+    "print(False or False)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "8663bf6f",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# in python 0 is considered false\n",
+    "0 == False"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6dd5c3f1",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "python-env",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.14"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/5_conditions.ipynb b/5_conditions.ipynb
new file mode 100644
index 000000000..6ede638fb
--- /dev/null
+++ b/5_conditions.ipynb
@@ -0,0 +1,267 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "a186d670",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "we are not in the 21st century.\n"
+     ]
+    }
+   ],
+   "source": [
+    "year = 1990\n",
+    "output = 'yes'\n",
+    "\n",
+    "if year >= 2000 and output == 'yes': \n",
+    "    print('we are in the 21st century.')\n",
+    "else:\n",
+    "    print('we are not in the 21st century.')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "05a061fa",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "we have gone way back in time\n"
+     ]
+    }
+   ],
+   "source": [
+    "# elif - shortform of else if\n",
+    "\n",
+    "year = 1700\n",
+    "\n",
+    "if year >= 2000:\n",
+    "    print('we are in the 21st century')\n",
+    "elif year >= 1900:\n",
+    "    print('we are in the 20th century')\n",
+    "elif year >= 1800:\n",
+    "    print('we are in the 19th century')\n",
+    "else:\n",
+    "    print('we have gone way back in time')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "ee3a21e8",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Weekday\n"
+     ]
+    }
+   ],
+   "source": [
+    "day_of_week = 'Thursday'\n",
+    "\n",
+    "if day_of_week == 'Saturday' or day_of_week == 'Sunday':\n",
+    "    print('Weekend')\n",
+    "else:\n",
+    "    print('Weekday')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 31,
+   "id": "acdd2070",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def eye_exam_covered(age, qualifying_condition, time_since_last_exam):\n",
+    "    # Assumptions:\n",
+    "    # age is an integer\n",
+    "    # Qualifying conditon is boolean - true if you have eligible medical condition\n",
+    "    # time_since_last_exam integer, number of months since last examination\n",
+    "\n",
+    "    if 0 <= age <= 19:\n",
+    "        if time_since_last_exam >= 12:\n",
+    "            return \"You are eligible for 1 major eye exam and any minor assessments needed\"\n",
+    "        else:\n",
+    "            return \"It hasn't been 12 months since your last major eye exam but you can have a minor assessment\"\n",
+    "    \n",
+    "    elif 20 <= age <=64:\n",
+    "        if qualifying_condition:\n",
+    "            if time_since_last_exam >= 12:\n",
+    "                return \"You are eligible for one major eye exam and 2 additional followup minor assessments\"\n",
+    "            else:\n",
+    "                return \"it has'nt been 12 months since your last eye exam, but you have follow-up minor assessement\"\n",
+    "        else:\n",
+    "            return 'You dont have an eligible medical condition'\n",
+    "    \n",
+    "    elif age >=65:\n",
+    "        if time_since_last_exam >=18:\n",
+    "            return \"You are eligible for 1 major eye exam and 2 followup minor assessment\"\n",
+    "        else:\n",
+    "            return \"It has not been 18 minths since your last eye exam\"\n",
+    "\n",
+    "    else:\n",
+    "        return \"Invalid age input\"    \n",
+    "\n",
+    "        "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "10709b63",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'You are eligible for 1 major eye exam and any minor assessments needed'"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "eye_exam_covered(19,False,14)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "b7a7cf4e",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "\"It hasn't been 12 months since your last major eye exam but you can have a minor assessment\""
+      ]
+     },
+     "execution_count": 12,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "eye_exam_covered(15,True,3)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 30,
+   "id": "21404b2d",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'You dont have an eligible medical condition'"
+      ]
+     },
+     "execution_count": 30,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "eye_exam_covered(23,False,10)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 25,
+   "id": "ec054d5a",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'It has not been 18 minths since your last eye exam'"
+      ]
+     },
+     "execution_count": 25,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "eye_exam_covered(65, True,10)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "26d502c8",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'You are eligible for one major eye exam and 2 additional followup minor assessments'"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "eye_exam_covered(50,True,18)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 32,
+   "id": "4ff436ee",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'Invalid age input'"
+      ]
+     },
+     "execution_count": 32,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "eye_exam_covered(-10,True, 10)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "python-env",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.14"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/6_lists.ipynb b/6_lists.ipynb
new file mode 100644
index 000000000..29491f2e2
--- /dev/null
+++ b/6_lists.ipynb
@@ -0,0 +1,290 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "36620364",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['a', 'e', 'i', 'o', 'u']"
+      ]
+     },
+     "execution_count": 2,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "vowels = ['a','e','i','o','u']\n",
+    "vowels"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "0afb256a",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[90, 80, 82, 91, 81]"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "score = [90,80,82,91,81]\n",
+    "score"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "be32c29f",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['K', 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "grades = ['K',1,2,3,4,5,6,7,8,9,10,11,12]\n",
+    "grades"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "a8dc45c3",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[<function len(obj, /)>,\n",
+       " <function sum(iterable, /, start=0)>,\n",
+       " <function max>,\n",
+       " <function min>]"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "summary_functions = [len,sum,max,min]\n",
+    "summary_functions"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "abb1273d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[]\n",
+      "[]\n"
+     ]
+    }
+   ],
+   "source": [
+    "empty_list = []\n",
+    "\n",
+    "empty_list_2 = list()\n",
+    "\n",
+    "print(empty_list)\n",
+    "print(empty_list_2)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "924e5687",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[['Sherlock', 'Watson'], ['Scooby', 'Shaggy', 'Fred'], 'Nancy Drew']"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# list within a list\n",
+    "\n",
+    "mystery_solvers = [['Sherlock','Watson'],\n",
+    "                    ['Scooby','Shaggy','Fred'],\n",
+    "                    'Nancy Drew']\n",
+    "mystery_solvers"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "a83b6c68",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['a', 'e', 'i', 'o', 'u']\n",
+      "a\n",
+      "['e', 'i']\n",
+      "o\n"
+     ]
+    }
+   ],
+   "source": [
+    "# we can slice lists or access list items using index\n",
+    "\n",
+    "print(vowels)\n",
+    "print(vowels[0])\n",
+    "print(vowels[1:3])\n",
+    "print(vowels[-2])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "b1386b9d",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[1, 4, 9, 16, 15, 100, 49]"
+      ]
+     },
+     "execution_count": 14,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# lists are mutable - so you can change the value in a list\n",
+    "\n",
+    "perfect_squares = [1,4,9,16,15,30,49]\n",
+    "\n",
+    "perfect_squares[5] = 100\n",
+    "\n",
+    "perfect_squares"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "60bc4b0a",
+   "metadata": {},
+   "source": [
+    "Immutable: Can't be changed after creation. \n",
+    "\n",
+    "Examples: int, float, str. \n",
+    "\n",
+    "In memory: Reassignment creates a new object. Original stays unchanged.\n",
+    "\n",
+    "Mutable: Can be changed in place. \n",
+    "\n",
+    "Examples: list. \n",
+    "\n",
+    "In memory: Changes affect the same object, changes affect all references to the object."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "a05a0b19",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "combo = ['burger', 'fries', 'drink']\n",
+    "kid_meal = list(combo)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "id": "14970692",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['chicken sandwich', 'fries', 'drink']\n",
+      "['burger', 'fries', 'drink']\n"
+     ]
+    }
+   ],
+   "source": [
+    "combo[0] = 'chicken sandwich'\n",
+    "print(combo)\n",
+    "print(kid_meal)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "254f9e4a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# list operations\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7aa555fd",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# list methods"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "python-env",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.14"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}