The conductivity of aluminium at room temperature is 3.82x107 ω-,m-1. given that aluminium has an atomic weight of 26.98 atomic mass units (amu), a valence of +3, and a density of 2.7 g. cm3 use the drude model to calculate a) the drift velocity of conduction electrons in a field of 25 v. m-" b) the electron mobility, c) the electron relaxation time, and d) the mean free path between electron collisions.