PROBLEM: Draw a signal-flow graph for the following state and output equations:
\dot{x}=\left[\begin{matrix} -2 & 1 & 0 \\ 0 & -3 & 1 \\ -3 & -4 & -5 \end{matrix} \right] x+\left[\begin{matrix} 0 \\ 0 \\ 1 \end{matrix} \right] ry=\left[\begin{matrix} 0 & 1 & 0\end{matrix} \right] x