QUESTION $9$

For a prototype OpAmp below $($differential amplifier cascaded with Common$-$emmiter and Common$-$Drain$),$ given VDD$=5$V$,-$VSS$=-5$V$,$ IREF$=0\mathrm{.}8$mA$,($W$/$L$)1=(\frac{W}{L})5=5.$ design requires $IO2=2\mathrm{.}0mA,IO3=2mA,1O4=10mA,$ assume all MOSFET transistors have $=\frac{0\mathrm{.}04}{V},$ and given $gm2=gm6=gm7=gm8=5mS,gm9=1\mathrm{.}2mS.$ For MOSFET $r_O=\frac{\frac{1}{}+|VD{S}_{DS}|}{\text{I}}DS$

At quiesent condition