Calculate the maximum space charge width and the maximum space charge density in a MOS capacitor with a p$-$type silicon substrate at T $=300$ K for doping concentrations of Na $=7$ x $1015$ cm$-3.($b$)$ Repeat part $($a$)$ for T $=350$ K$.(=2\mathrm{.}81019,=1\mathrm{.}041019$ at room temperature$)$