For the common gate amplifier in the figure below.

$($a$)$ Determine $I_{DQ}$ and $V_{SD}$

$($b$)$ Determine the voltage gain $Av.$

$V^{+}=5V$

$V^{-}=-5V$

$Rs=4K$

$RD=2K$

$RL=4K$

$RG=50K$

$R=0\mathrm{.}5K$

PMOS

$K_p=1m\frac{A}{V^2}$

$V_{TP}=-0\mathrm{.}8V$

$=0$

$C_{gs}=4pF$

$C_{gd}=1pF$