Columns 1 2 3 4 5 A= 16 4101 A (2,4) 1271 9 2 Rows 3 4 13 18 A (17) 1-by-1 m-by-1 1-by-n m-by-n 0 4 0.551 56 15 20 2383 1 Exercises: (1) Reference the element in row 2, column 4 with two-indices, then multiply it by 2; (2) Reference the element in row 2, column 4 with one-index then multiply it by 3; (3) Reference all elements in column 3, then multiply it 0.5 (4) Reference all elements in row 4, then divide by 2; (5) Reference all array (elements), then power to 2