The steel shaft (Figure Q4) has a diameter of 50 mm and is fixed at its ends A and B. It is subjected to the torques Tc and Tp as shown. a. Draw the torque diagram for the shaft. Determine the absolute maximum internal torque in the shaft. b. Determine the absolute maximum shear stress in the shaft. (15%) (10%) TD=240 N.m B 1 m Tc=590N.m D 1.5 m A 1 m Figure Q.4