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A simply supported composite beam 4 m long carries a uniformly distributed load of intensity q = 2.2 kN/m (see figure). q = 2.2 kN/m 4 m (a) Find the maximum bending stresses the steel. (Enter the magnitudes.) 06.61 % = 49.0 3.09 mm 'O The beam is constructed of a wood member, 100 mm wide by 150 mm deep, and is reinforced on its lower side by a steel plate 8 mm thick and 100 mm wide. (Assume that the component parts of the beam are securely bonded by adhesives or connected by fasteners. Also, be sure to use the general theory for composite beams described in the section titled 'Composite Beams.") and a (in MPa) in the wood and steel, respectively, due to the uniform load if the moduli of elasticity are E = 10 GPa for the wood and E = 210 GPa for ✔ MPa ✓ MPa 100 mm 150 mm 8 mm (b) Find the required thickness (in mm) of the steel plate so that the steel plate and wood reach their allowable stress values, as = 100 MPa and aw = 8.6 MPa, simultaneously under the maximum moment.