a) 9-2. Determine the stress components acting on the inclined plane AB. Solve the problem using the method of equilibrium described in Sec. 9.1. 65 MPa 20 MPa b) Repeat 9-2 using the stress transformation equations from Sec. 9.2. c) For 9-2, determine (i) the principal stresses and ii) the maximum in-plane shear stress and average normal stress at the point. Specify the orientation of the element in each case. d) 9-44. Solve Prob. 9-2 using Mohr's circle.