Do not round intermediate answers. Give your final answer(s) to three decimal places. Check your units. Note: This problem is optional and not graded. It is not part of the homework set and does not carry any points. The torques shown are exerted on pulleys A and B. Knowing that each shaft is solid, determine the maximum shearing stress: (a) in shaft AB, (b) in shaft BC. TA = 200 N-m 36 mm TB = 750 N-m 40 mm T(AB) = MPa A T(BC)= MPa B C