A hollow circular cylinder made of steel (E =200 GPa, G=77 GPa)is subject to a torque T at one end and is fixed at the other end outer diameter of the rod is 50mm and inner diameter is 44mm. The length of the rod is 60 cm. What is the maximum torque so that the allowable shear stress (250 MPa) is not exceed and twist angle does not exceed 4 degrees