Find the Matrix Product AB for the Partitioned Matrices A) $$\left[ \begin{array} { r r r | r } - 4 & - 1 & 32 & 23 \\- 17 & - 3 & 14 & - 1 \\21 & 11 & 46 & 52\end{array} \right]$$

Find the matrix product AB for the partitioned matrices.
- $$A = \left[ \begin{array} { r r | r } 4 & 0 & 1 \\2 & - 1 & - 3 \\5 & 3 & 7\end{array} \right] , B = \left[ \begin{array} { r r r | r } - 2 & 0 & 8 & 5 \\1 & 6 & 2 & 2 \\\hline 4 & - 1 & 0 & 3\end{array} \right]$$

A)
$$\left[ \begin{array} { r r r | r } - 4 & - 1 & 32 & 23 \\- 17 & - 3 & 14 & - 1 \\21 & 11 & 46 & 52\end{array} \right]$$
B)
$$\left[ \begin{array} { r r r | r } - 4 & - 1 & 0 & 3 \\- 12 & - 3 & 0 & - 9 \\\hline 28 & - 7 & 0 & 21\end{array} \right]$$

C)
$$\left[ \begin{array} { r r r | r } - 8 & 0 & 32 & 20 \\- 5 & - 6 & 14 & 8 \\- 7 & 18 & 46 & 31\end{array} \right]$$
D)

$$\left[ \begin{array} { r r r | r } - 4 & - 1 & 32 & 23 \\- 17 & - 3 & 14 & - 1 \\\hline 21 & 11 & 46 & 52\end{array} \right]$$