Write a method 'evenSum' that takes a List as an argument and that returns the sum of the values in even indexes of the list (0, 2, 4, etc). For example, if evenSum() is called on a List containing [8, 6, 7, 5, 3, 0, 9] the method should return 27 (the sum of 8, 7, 3, 9, which are the values stored in even indexes of the List). Notice that what matters is whether the value is an even index, not whether the value itself is an even number.