Consider the preceding problem if the beam has width b = 75 mm, the aluminum strips have thickness t = 3 mm, the plastic segments have heights d =40 mm and 3d = 120 mm, and the total height of the beam is h = 212 mm. Also, the moduli of elasticity are Ea =75 GPa and Ep = 3 GPa, respectively.
Determine the maximum stresses σa and σp in the aluminum and plastic, respectively, due to a bending moment of 1.0 kN  m.