An abrupt Si p$-$n junction $($A $=104$ cm$2,$ assume ideal diode characteristics, ni $=1\mathrm{.}5$ x $1010$ cm$-3)$ has the following properties at $300$ K: p side n side NA $=1017$ cm$-3$ ND $=1015$ cm$-3$ n $=0\mathrm{.}1$ s p $=10$ s p $=200$ cm$2/$V $$ s n $=1300$ cm$2/$V $$ s n $=700$ cm$2/$V $$ s p $=450$ cm$2/$V $$ s $(10$ points$)$ The junction is forward biased by $0\mathrm{.}5$ V$.$ What is the forward current? $(5$ points$)$ What is the current at a reverse bias of $0\mathrm{.}5$ V$?$