A pn-junction is uniformly doped and has dopant concentration of NA = 4 x10^16 cm^-3 in the p-region at 300K. At zero bias, 20% of the total space charge region (W) is extended in the p-region.Calculate Vbi, ND, W, xn and xp. Given that ni = 1.8 x 10^6 cm^-3 and ε=1.16 x 10^-12 F/cm.