6-93. The wing spar ABD of a light plane is made from2014-T6 aluminum and has a cross-sectional area of800 mm.?, a depth of 75 mm, and a moment of inertia

about its neutral axis of 1.11(10-6) m“. Determine the absolute maximum bending stress in the spar if the anticipated loading is to be as shown. Assume A, B, and C are pins. Connection is made along the central longitudinal axis of the spar.