A solid shaft 200 mm in diameter rotates at f = 20 rev/sec and is subjected to a bending moment of 21p kN.m. Determine the torque T and power P that can also act simultaneously on the shaft without exceeding a resultant shearing stress of 56 MPa and a resultant normal stress of 98 MPa. (With f expressed in rev/sec and torque in N.m,P=2pf·T in watts.)