This is what I entered but just got a bunch of zeroes. I need the matrix to be 4x4 with the numbers 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16. When I run the program it needs to show the matrix, "Sum of row 1:", "Sum of row 2:" (as well as row 3 and 4), "Sum of column 1:" (and the rest of the columns), and sum of diagonals.