an annular plate of thickness t and modulus g is used to connect shaft ab of radius r1 to tube cd of radius r2. knowing that a torque t is applied to end a of shaft ab and that end d of tube cd is fixed, (a) determine the magnitude and location of the maximum shearing stress in the annular plate, (b) show that the angle through which end b of the shaft rotates with respect to end c of the tube is ϕbc