Please solve the transfer function T$($s$)=$C$($s$)/$R$($s$)$ by hand, not using a computer program. $G1(s)=\frac{1}{s+7}$

$G2(s)=\frac{1}{s^2+2s+3}$

$G3(s)=\frac{1}{s+4}$

$G4(s)=\frac{1}{s}$

$G5(s)=\frac{5}{s+7}$

$G6(s)=\frac{1}{s^2+5s+10}$

$G7(s)=\frac{3}{s+2}$

$G8(s)=\frac{1}{s+6}$