Assuming general initial conditions, express the system model in

a. Configuration form.

b. Standard, second-order matrix form.

\(\left\{\begin{array}{l}\frac{1}{3} \ddot{x}_{1}+\dot{x}_{1}+2\left(x_{1}-x_{2}\right)=e^{-2 t} \\ \frac{3}{5} x_{2}-2\left(x_{1}-x_{2}\right)=0\end{array}\right.\)