5. The energy of formation, Aha, of a vacancy defect in a typical metal varies from approximately 0.6 to 4 eV. (a) Plot the variation in the fraction of vacancy defects present, na/N, in a crystal at 1000 K as a function of the defect formation energy. (b) Plot the variation in the fraction of defects present as a function of temperature if the defect formation energy is 2.2 eV. (20 points total)