$$For a nmos transistor $\_$n c$\_$ox$=500$ A$/$V$^2$ and W$/$L$=20$ v$\_$t$=+0\mathrm{.}5$V $=1/$V$\_$A $=0\mathrm{.}1$ V$^(-1)$

v$\_$GS$=0\mathrm{.}7$V $$ V$\_$DD$=2\mathrm{.}5$V$$ R$\_$D$=10$k$$ Find the DC bias values, ignore the channel length modulation effect

a$)$ID $\_\_\_\_\_\_\_\_\_\_\_\_\_$

b$)$VDS$\_\_\_\_\_\_\_\_\_\_\_\_\_$

c$)$ Calculate gm at the bias point $\_\_\_\_\_\_\_\_\_\_\_\_\_$

d$)$ Calculate the small signal voltage gain, include ro

$$ of this amplifier $\_\_\_\_\_\_\_\_\_\_\_\_\_$