error identify

problems/easy/easy_q2.py

@@ -1,11 +1,11 @@
 # Find the Largest Number: Accept two numbers and print the larger one.
 def largest_of_two(a, b):
     if a > b:
-        return b   
+        return a   
     else:
-        return a
+        return b
 if __name__ == "__main__":
     num1 = int(input("Enter the First Number :"))
     num2 = int(input("Enter the Second Number :"))
-    res = largest_of_two(num1,num1)
+    res = largest_of_two(num1,num2)
     print(res)

problems/easy/easy_q3.py

@@ -1,8 +1,9 @@
 # Leap Year or Not: Write a program to determine whether a given year is a leap year.
 def is_leap_year(year):
     if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:   
-        return "Not a Leap Year"   
-    return "Leap Year"
+        return " Leap Year"   
+    else:
+        return "not a Leap Year"
 if __name__ == "__main__":
 
     num = int(input("Enter the number :"))

problems/easy/easy_q5.py

@@ -2,13 +2,13 @@
 
 def grade_system(marks):
     if marks >= 90:
-        return "B"  
+        return "A"  
     elif marks >= 80:
-        return "A"   
+        return "B"   
     elif marks >= 70:
-        return "F"   
+        return "C"   
     else:
-        return "C"  
+        return "F"  
 
 if __name__ == "__main__":
       num = input("Enter the Mark : ")