(10) 1. Copper has a density pм = 8.95 g/cm³, and an electrical resistivity p = 1.55 x 10-8 ohm-m at room temperature. Calculate: a) the conduction electron density n b) the relaxation time t c) the Fermi energy EF d) the Fermi velocity VF e) the mean free path for electrons at the Fermi level /MFP