Use V$=25$mV$,$ VE$-0\mathrm{.}7$V where appropriate.

Part I $(30$ pts total$)$

$1.(2$ pts each$)$ For the differential amplifier here,

a$.$ v$.$ is the input to a $($M$$ or M$2)$

b$.$ If Vi$=10$mV cos$(6$zt$)+2$V cos$(120$nt$)$ and V:$=2$V cos$(120$x$),$ Vid

$=$