Problem $4.$ A system is represented by y$/$u $=$ G$($s$)=($s $+4)/(($s $+2)($s $^2+3$s $+10))$ A For u a unit step function, do the following: $($ a$)$ Expand the response y$($s$)$ using partial fraction expansion $($b$)$ Determine the time response to the unit step, y$($t$)($ c$)$ Plot the analytical result from $($b$)$ along with the result from using Matlab $($or Python signal module$)$ step$()$ function