$1.$ Consider the block diagram shown below. Create an m$-$file to complete the following tasks:$($a$)(40$ points$)$ Compute the step response of the closed$-$loop system $($i$.$e$.,$ R$($s$)=1/$s andTa$($s$)=0)$ and plot the steady$-$state value of the output Y $($s$)$ as a function of the controllergain O