Find the Indicated Matrix $A = \left[ \begin{array} { r r } 2 & - 8 \\ 1 & 6 \\ 0 & 1 \end{array} \right]$

Multiple Choice

Find the indicated matrix.
-Let $A = \left[ \begin{array} { r r } 2 & - 8 \\ 1 & 6 \\ 0 & 1 \end{array} \right]$ and $B = \left[ \begin{array} { r r } - 3 & 2 \\ 1 & - 1 \\ 6 & 1 \end{array} \right]$ . Find $A B$ .

A) $\left[ \begin{array} { r r r } 9 & - 1 & 4 \\ - 24 & - 5 & 1 \\ 2 & 10 & 12 \end{array} \right]$
B) not defined
C) $\left[ \begin{array} { r r r } - 24 & 10 & 4 \\ 9 & - 5 & 12 \\ 2 & - 1 & 1 \end{array} \right]$
D) $\left[ \begin{array} { r r r } 4 & 10 & - 24 \\ 12 & - 5 & 9 \\ 1 & - 1 & 2 \end{array} \right]$