Obtain the response curves $y(t)$ using MATLAB for the following system.

\[\begin{aligned}& \begin{array}{l}\dot{x}_{1} \\\dot{x}_{2}\end{array}=\begin{array}{lll}-1 & 1 \\-1 & 0 & x_{1} \\x_{2}\end{array}+{ }_{2}^{0} u \\& y=\left[\begin{array}{ll}1 & 0\end{array}\right] \begin{array}{l}x_{1} \\x_{2}\end{array}\end{aligned}\]

The input $u$ is given by:

(a) $u=$ unit-step input

(b) $u=e^{-t}$

The initial state $x(0)=0$.