$$\left[\begin{matrix} 0 & 0 & 0 \\4 & -1 & 3 \\2 & 5 & 1 \end{matrix}\right]$$
$0$
$\left(\begin{matrix}0&0&0\\4&-1&3\\2&5&1\end{matrix}\right)$
$0$
$\left(\begin{matrix}0&4&2\\0&-1&5\\0&3&1\end{matrix}\right)$
$3,3$
$\left(\begin{matrix}1&0&\frac{8}{11}\\0&1&-\frac{1}{11}\\0&0&0\end{matrix}\right)$
$\left[\begin{array}{rrr}-16 & 0 & 0 \\ 2 & 0 & 0 \\ 22 & 0 & 0\end{array}\right]$
