A 50 mm diameter shaft is subjected to a static axial load of 160kN. If the yield stress of the material is 350MPa, the ultimate tensile stress is 400MPa and the fatigue limit (endurance limit) for R = -1.0 is 320 MPa, what is the amplitude of the largest fullyreversed bending moment that can be applied to this shaft so that fatigue does not occur?