An NMOS transistor with $$k$\text{'}=800$ A$/$V$2,$ W$/$L$=12,$ VTh$=1\mathrm{.}0$V$,$ is operated with VGS$=3\mathrm{.}5$ V$.$

What current ID does the transistor have when is operating in saturation? Write the answer in mA

The biasing current sources are equal:$$ I$1=$I$2=0\mathrm{.}2$mA

Find Rin and the overall voltage gain $($Av$=$vo$/$vs$).$

Round your answer to three significant digits.