For the differential amplifier specified in Problem. $3$ let $$G$2=0$ and $$ G$1=$id $.$ Find the value of vid that corresponds to each of the following situations: $($a$)$D$1=$D$2=0\mathrm{.}08$ mA ; $($b$)$D$1=0\mathrm{.}12$ mA and $$D$2=0\mathrm{.}04$ mA ;$($c$)$D$1=0\mathrm{.}16$ mA and $$D$2=0($Q$2$ just cuts off$)$; $($d$)$D$1=0\mathrm{.}04$ mA and $$D$2=0\mathrm{.}12$ mA; $($e$)$D$1=0$ mA $($Q$1$ just cuts off$)$ and $$D$2=0\mathrm{.}16$ mA$.$ For each case, find $$S $,$D$1,$D$2,$ and $($D$2$D$1).$