Given a 2D array of integers (1D arrays to build a 2D array from), that is guaranteed to be 3 rows and 3 columns, return a new 1D array that is size 2, where the first value is the sum of the diagonal going from top left to bottom right, and the second value is the sum of the diagonal going from the top right to the bottom left in the 2D array. Your first two lines of code must be:

int[][] arr = {row1, row2, row3};
int[] diagSums = new int[2];