(a) 4 Ga atoms per unit cell 4 Number density (5.65 x10 Density of Ga atoms = 2.22 x10 cm - 4 As atoms per unit cell Density of As atoms = 2.22 x10 cm -> Provide feedback (0) Step 2 of 2 (b) 8 Ge atoms per unit cell 8 Number density (5.65 x10-3