a solid 60-mm cold-rolled brass (39GPa) shaft that is 1.25m long extends through and is completely bonded to a hollow aluminium (G=28GPa) tube. Aluminium tube (1) has an outside diameter of 90mm, an inside diameter of 60mm, and a length of 0.75m. both the brass shaft and the aluminium are securely attached to the wall at A. When the two torques are applied to the composite shaft, determine: the maximum shear stress magnitude in aluminium tube (1), the rotation angle of joint B and c