Use the Matrix Capabilities of a Graphing Utility to Find

Multiple Choice

Use the matrix capabilities of a graphing utility to find AB, if possible. $A = \left[ \begin{array} { c c } 3 & 2 \\6 & 2 \\1 & - 4 \\5 & 7\end{array} \right] , B = \left[ \begin{array} { c c c c } - 8 & 4 & - 1 & - 2 \\3 & 3 & - 4 & - 9\end{array} \right]$

A) $\left[ \begin{array} { c c c c } - 18 & 18 & - 11 & - 24 \\- 42 & 30 & - 14 & - 30 \\- 20 & - 8 & 15 & 34 \\- 19 & 41 & - 33 & - 73\end{array} \right]$
B) $\left[ \begin{array} { c c c c } - 18 & - 42 & - 20 & - 19 \\18 & 30 & - 8 & 41 \\- 11 & - 14 & 15 & - 33 \\- 24 & - 30 & 34 & - 73\end{array} \right]$
C) $\left[ \begin{array} { c c c c } - 30 & 6 & 5 & 12 \\- 54 & 18 & 2 & 6 \\4 & 16 & - 17 & - 38 \\- 61 & - 1 & 23 & 53\end{array} \right]$
D) $\left[ \begin{array} { c } - 18 \\30 \\- 29 \\- 73\end{array} \right]$
E) not possible