A reinforced concrete beam has a width of 300mm and a total depth of 450mm. The longitudinal bars at the top are 2-28mm and 4-32mm at the bottom. Concrete strength is f'c=21 MPa and steel yield strength fy3D275 MPa. The steel cover is 70mm (for both top and bottom steel). Use fc(allow) = 0.45f'c and fs(allow) = 0.5fy a) What is the transformed moment of inertia? b} Determine the mornent capacity (kN-m) of the beam using WSD. b) Determine the maximum stresses in the concrete, tension steel, and compression steel if 85% of the moment capacity is applied to the beam.