$\left(\begin{array}{c}{x}_1\\ x_2\end{array}\right)$ $\left(\begin{array}{cc}{w}_{1,1}& w_{1,2}\\ w_{2,1}& w_{2,2}\\ w_{3,1}& w_{3,2}\end{array}\right)$ $\left(\begin{array}{c}{w}_{1,1}{x}_1+w_{1,2}{x}_2\\ w_{2,1}{x}_1+w_{2,2}{x}_2\\ w_{3,1}{x}_1+w_{3,2}{x}_2\end{array}\right)$ $\left(\begin{array}{cc}{x}_1& x_2\\ 0& 0\\ 0& 0\end{array}\right)$ $\left(\begin{array}{cc}0& 0\\ x_1& x_2\\ 0& 0\end{array}\right)$ $\left(\begin{array}{cc}0& 0\\ x_1& x_2\\ 0& 0\end{array}\right)$