A. Steps for A•B
 The number of columns in matrix A must be equal to the number of rows in matrix B.
 Multiply the entries in row 1 of matrix A by the entries in column 1 of matrix B, add the products and the result goes in row 1 column 1 of answer.
 Multiply row 1 of matrix A by column 2 of matrix B, add the products and the result goes in row 1 column 2 of answer.
 Continue until row 1 of matrix A has been multiplied by every column of matrix B.
 Multiply row 2 of matrix A by every column of matrix B.
 Continue until you have used each row in matrix A.
 Matrix multiplication is not commutative. AB ¹ BA


