Txy 6 X The figure (not drawn to scale) shows a state of stress in a xy frame of reference. Given direct stresses o, 90 MPa and y = -25 MPa, and shear stress Try = -20 MPa, calculate the principal stresses (max, min, and the angle e, at which they occur. Enter your answers in the boxes below. The answers are acceptable within a tolerance of 0.1 MPa for the stresses and 0.1 for the angle. O max min: Op : MPa (2 mark) MPa (2 mark) (2 mark)