3. A germanium pn diode at T = 300K has the following parameters: Na=1018cm-3, Nd = 1016cm-3, Dp = 49cm2/s, Dn = 100cm2/s, τp0 = τn0 = 5µs, and A = 10-4cm2. Determine the diode current for (a) a forward-bias voltage of 0.2V, and (b) a reverse-bias voltage of 0.2V.