Consider the free electron energy bands of an fee crystal lattice in the approximation of an empty lattice, but in the reduced zone scheme in which all k\' s are transformed to lic in the first brillouin zon. Plot roughly in the [111] direction the energies of all bands up to six times the lowest band energy at the zone boundary at k= (2pi/a)(1/2,1/2,1/2). Let this be the unit of energy.This problem shows why band edges need not necessarily be at the zone centre. Several of degeneracies (band crossings) will be removed when account is taken of the Crystal potential.