Use matrices A, B, C , and D to find each scalar product and sum, or difference, if possible. If an operation is not defined, label it undefined.
A = [6 1 0 8 -4 3 7 11 ] B = [1 3 -2 4] C = [-2 1 4 0 2 2 1 1] D = [5 -2 3 6]

3 A