Square(n) Sum
Complete the square sum function so that it squares each number passed into it and then sums the results together.
For example, for [1, 2, 2] it should return 9 because 1^2 + 2^2 + 2^2 = 9
Average in List
Write a function which calculates the average of the numbers in a given list.
Note: Empty arrays should return 0.