I am using Python on Windows

Exercise 2 Write a function "listSum" that receives a list 1 and returns the sum of numbers between the 2nd and the 7th elements (inclusive). Assume the list only contains integer numbers Sample Input 1 = (12,20,30,40,10,1,2, 4,21735, 36,28,66) Expected Output 103 ***Hints: 20-30-40+10+12 103