$3.(8$ points$)$ In this circuit re$,$ M$1$ and M$2$ have identical parameters of K $=$ X$3$ID$/100$ mA$/$V$2,$ Vtn $=0\mathrm{.}5$ V$,$ and $=0\mathrm{.}1$ V$-1.$ VDD $=5$ V$.($a$)$ What value of RD will result in $3$ V across it$?($b$)$ What is the resulting value of the current through RD$,$ IRD? $($c$)$ If V $($which is VDS$2)=2$ V$,$ what is the value of the ratio I$/$IRD$?($d$)$ If V $=3$ V$,$ what is the value of the ratio I$/$IRD$?$