Find the final value of this system given a unit
step input (i.e. find
y(t) as -> [infinity]). Here, Y(s) = X(s)T(s) where X(s) is the unit step input (i.e.X(s) = 1/s).
T(s) = (s + 2) (s + 3) / (s + 1)(s + 4)(s+9)