WeBWorK Standalone Renderer

Let $A$ and $B$ be the following matrices.

$A = \left[\begin{array}{cccc} -6 &1 &-6 &5 \end{array}\right], \qquad B = \left[\begin{array}{c} 9\cr 1\cr -5\cr 4 \end{array}\right]$

Perform the following operations:

$A \cdot B =$ $\left[\right.$ $\left.\right]$

$B \cdot A =$ $\left[\Rule{0pt}{4.8em}{0pt}\right.$ $\left]\Rule{0pt}{4.8em}{0pt}\right.$

You can earn partial credit on this problem.