13. A lattice consist of regular arrangement of BCC unit cells. The miller indices of a set of parallel planes is (hkl) with respect to the conventional basis vectors, shown by x,y,z in the figure below. Find out the miller indices of same set of parallel planes with respect to the primitive basis vectors shown by a1,a2,a3 in the same figure for following values of h,k,l : (a) (hkl)=(100), (b) (hkl)=(111)