Sketch an sc unit cell with lattice constant a=4 angstroms,whose diatomic basis of atom A is located at the lattice sites, andwith atom B displaced by (a/2,0,0). ASsume that both atoms have thesame size and we have a clse packed structure, or nearest neighboratoms touch eachother. calculate
a) the packing fractiong (fraction of the total volumeoccupied by atoms)
b) the number of B atoms per unit volume
c) the number of A atoms per unit area on (100) planes