The electron drift mobility in silver has been measured to be 54 cm?v-'sat 27 C. The atomic mass and density of Ag are given as 107.87 amu or g mol- and 10.50 g cm", respectively. (1). Assuming that each Ag atom contributes one conduction electron, calculate the resistivity of Ag at 27 C. Compare this value with the measured value of 1.6 x 10-8 2m at the same temperature and suggest reasons for the difference. Based on the resistivity value, determine how many free electrons are donated by each Ag atom in the crystal. How does this compare with the position of Ag in the Periodic Table (Group 11 (IB) and Period 5)? (ii). Calculate the thermal conductivity of silver at 27 C and at 0 C