Determine the maximum shear stress at point A, for the pressurized cylinder, shown in Figure P4.56. The cylinder is attached at one end and loaded with a pipe wrench at the other, so that it is subjected to a bending stress of 75 MPa and a torsional stress of 100 MPa. The internal pressure causes a tangential stress of 100 MPa and an axial stress of 60 MPa that act on an element at point A.