Given matrices A = \( \begin{bmatrix} 2 & 3 \\ 4 & -1 \\ \end{bmatrix} \) and B = \( \begin{bmatrix} 1 & 2 \\ 3 & 1 \\ \end{bmatrix} \), compute the product AB.

Step 1 ：Multiply the first row of A by the first column of B: \( (2*1) + (3*3) = 2 + 9 = 11 \)

Step 2 ：Multiply the first row of A by the second column of B: \( (2*2) + (3*1) = 4 + 3 = 7 \)

Step 3 ：Multiply the second row of A by the first column of B: \( (4*1) + (-1*3) = 4 - 3 = 1 \)

Step 4 ：Multiply the second row of A by the second column of B: \( (4*2) + (-1*1) = 8 - 1 = 7 \)

Step 5 ：The resulting matrix is therefore \( \begin{bmatrix} 11 & 7 \\ 1 & 7 \\ \end{bmatrix} \)