Write a method called Collapse2 that accepts an array of integers as a parameter and returns a new array containing the result of replacing each pair of integers with the sum of that pair. For example, if an array called nums contains the values {7, 2, 8, 9, 4, 13, 7, 1, 9, 10}, then the call to the method Collapse2 should return a new array containing {9, 17, 17, 8, 19}. The first pair from the original list 7 + 2 = 9 and so on. If the given array of numbers has an odd number of elements then place the last element into the new array.