A round cantilever bar is subjected to torsion plus a bending load at the free end. The bar is made of a ductile material having a yield strength of 276MPa. The bending force F is 1.5kN and the axial tension P=0.0KN, the torque is 68N.m applied to the free end. The bar is 120mm long (L) and a safety factor of 2.5 is assumed. Transverse shear can be neglected. Determine the minimum diameter to avoid yielding using both MSS criteria.