a)
photo generation rate= 8e+20 EHPs/cm^3s
b)
resistivity before illumination= 5.21 ohm-cm
resistvity after illumination= 3.397 ohm-cm
percent of conductivity= 8.70 percent
c)
quasi Fermi level due to electron=Efi+0.296 eV
quasi Fermi level due to holes=Efi-0.264 eV