Problem 1 In each of the following cases indicate Whether the structure is a Bravais lattice. If it is, give three primitive vectors; if it is not, describe it as a Bravais lattice with as small as possible a basis. (a) Basecentered cubic (simple cubic with additional points in the centers of the horizontal faces of the cubic cell). (b) Side-centered cubic (simple cubic with additional points in the centers of the vertical faces of the cubic cell). (8 points)