For the rigid building frame shown in Figure P5-22, determine the forces in each element and calculate the bending stresses. Assume all the vertical elements have A = 10 in.2 and I = 100 in.4 and all horizontal elements have A = 15 in.2 and I = 150 in.4 Let E = 29 × 106 psi for all elements. Let c = 5 in. for the vertical elements and c = 6 in. for the horizontal elements, where c denotes the distance from the neutral axis to the top or bottom of the beam cross section, as used in the bending stress formula σ = (Mc / I).