Gallium has an orthorhombic structure with a0 = 0.45258 nm, b0 = 0.45186 nm, and c0 = 0.76570 nm. The atomic radius is 0.1218 nm. The density is 5.904 g/cm3, and the atomic weight is 69.72 g/mol. Determine
(a) The number of atoms in each unit cell; and
(b) The packing factor in the unit cell.