how do you design a multistage amplifier with specifications for example these requirements:

$($a$)$ Av $>=70$

$($b$)$ Zin $>=100$k$\backslash$Omega

$($c$)$ Zout $>=20$k$\backslash$Omega

$($d$)$ Maximum unclipped output of $6$V peak to peak

$($e$)$ VDD $<=20.$