Consider a two component rod fixed at the left end. the first component (on the left, positioned from z=0 to z=l/2) is a solid rod with a shear modulus of g and radius c1. the second component (on the right, positioned from z=l/2 to z=l) is a hollow pipe fixed to component 1 at z=l/2 with the same shear modulus and outer radius c1, but with an inner radius of c2. a torque of 6to is applied at z=l/2, and a torque of -2to is applied at z=l. what value of c2 is required to make the maximum shear stress equivalent in each component? what is the angle of twist at the free end at z=l?