Compute Ax for the following two paris of matrices using (a.) dot products with the column vector and (b.) as a combination of the columns: 1 -2 - 2 1 0 0 -4 - 24 3 1 2 1 1 0 2 1 1 2 0 1 ][ 0 0 1 2 2 2 3 11 1 1 1 2