A beаm hаs dimensiоns оf b = 14 in., h = 24 in., аnd d = 21.5 in. and is reinfоrced with 2 No. 5 bars. The concrete strength is 3,700 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the nominal moment capacity, Mn, of the beam.