the tube is made of C86100 bronze and has a rectangular cross section as shown in Fig. 5-32a. If it is subjected to the two torques, determine the average shear stress in the tube at points A and B. Also, what is the angle of twist of end C? The tube is fixed at E. 3 mm 60 mm 3 mm 40 mm B 5 mm 25 N-m DO C 0.5 m 60 N·m 1.5 m E