Assume that an n-type semiconductor is uniformly illuminated, producing a uniform excess generation rate g 7.5 - 101 cm leading to a steady-state excess minority hole concentration of op = 1.5- 1015 [cm31. the electron and hole mobilities at room temperat are n1350 [cm2 - v-1. sand u 480 [cm2. v-1.s a) determine the excess minority carrier lifetime tp0. give the answer in seconds s. 0.2*10a-4 0.2 10 4 in the dark, the above mentioned semiconductor's conductivity at room temperature is oo = 0.41 s. cm 11. b) calculate the conductivity under uniform illumination. give the answer in [s -11and two decimal numbers.