Solve each of the following problem indicated below. Present your complete-detail solution including the free- body diagrams. Box your only final answer, otherwise.
Extracted text: A reinforced concrete beam has a width of 400 mm and an effective depth of 600 mm. It is reinforced for tension with 4 – 28 mm ø bars. f' = 20.7 MPa, f, = 414.6 MPa. %3D O Determine the percent increase in nominal moment if the depth is increased to 700 mm. 2 Determine the percent increase in nominal moment if f' is increased to 27.6 MPa. 3 Determine the percent increase in nominal moment if the steel is change to 4 - 32 mm ø.