Problem 2 (6 points) We have a 3-dimensional lattice structure with a basis of 2 atoms at the following coordinates. a) Describe and draw what is this structure?? (1 r1 = (0,0,0) r2 = 5(1,0,1) G = $011, n2, n3) Where,n1,n2,n3 are integers b) Calculate SG for different combinations of n1,n2,n3 , being odd or even to define zero and non-zero x-ray amplitudes. Here f is the form factor and is a constant and identical for both atoms