A steel tube with the cross section shown is 6 ft long and has a wall thickness of 0.12 in. (a) If the allowable shear stress is 8000 psi, determine the largest torque that can be applied safely to the tube. (b) Compute the corresponding angle of twist. Use G 12 x 106 psi for steel. 2 in 2 in.- FIG. P3.46 T 2 in. 2 in.