Assume that for the previous problem you obtained values of -10 ksi for the bending stress at a and -2.0 ksi for the shear stress at a (using beam sign conventions; neither of which are the answers to problem 3). for the given state, use the principle stress and max in-plane shear stress to determine the safety factor at this location if the material at the joint at a has a 30 ksi failure strength in compression and a 10 ksi failure strength in shear.