Find a state$-$space representation for a system described by the following two differential equations. Note that this is a multi$-$input, multi$-$output system.

$\frac{d^2{y}_1}{d{t}^2}+2\frac{d{y}_1}{dt}-3(y_1-y_2)=-u_1$

$\frac{d^2{y}_2}{d{t}^2}+\frac{d{y}_2}{dt}+2(y_2-y_1)=3u_2$