Consider the FET amplifier for the case Vt $=2$V$,$ kn$\text{'}($W$/$L$)=1$mA$/$V$2,$ VGS $=4$ V$,$ VDD $=10$V$,$ & RD $=3\mathrm{.}6$k $($a$)$ Find the dc quantities ID and VD$.($b$)$ Calculate the value of gm at the bias point. $($c$)$ Calculate the value of the voltage gain. $($d$)$ If the MOSFET has $=0\mathrm{.}01$ V $-1,$ find ro at the bias point and calculate the voltage gain