Provided with the $2$N$7000$N$-$channel MOSFET having a threshold voltage VT$=2\mathrm{.}1$and a single power supply VDD$=3$V

$($i$)$Bias the MOSFET at point P$(1$mA$,1\mathrm{.}5$V$)$

$($ii$)$Determine the voltage gain Av $$of the amplifier.

Assume that the device has nCoxWL$=200$mA$/$V$2$