The bracket in Figure is subjected to a sinusoidal force time function with Fmax = Fand Fmin = -F, where F and the beam's other data are given in the

row(s) assigned from Table.Find the stress states at points A and B due to this fully reversed loading and choose a ductile steel or aluminum material specification that will give a safety factor of 2 for infinite life if steel or N= 5E8 cycles if aluminum. Assume a geometric stress-concentration factor of 2.5 in bending and 2.8 in torsion.