Q3) The 60-mm-diameter solid shaft is made of A-36 steel and is subjected to the distributed and concentrated torsional loadings shown. Determine the angle of twist at the free end A of the shaft due to these loadings. Assume: G=75 GPa B 2 kN·m/m 600 N·m 400 N-m 0.8 m 0.6 m A