Derive time$-$domain function $y(t)$ of the following Laplace transforms.

$($a$)Y(s)=\frac{4}{(s+3)(s^2+2s+1)}$

$($b$)Y(s)=\frac{2e^{-2s}}{s^3+4s}$

$($c$)Y(s)=\frac{s+3}{s^2+2s+5}$

$($d$)Y(s)=\frac{e^{-4s}}{2s^3+3s^2+2s}$