$2\mathrm{.}73$ Use MATLAB to solve for and plot the step response of the following model,

where the magnitude of the step input is $5.$

$3x^{}+21x^{}+30x=f(t)$

Book Problem $2\mathrm{.}73,$ page $128$

You may assume zero initial conditions

Using the final value theorem, find the steady state value and briefly compare in words

the final value theorem result and the results to the Matlab numerical solution.