(Solved): \( .2 \) Rectangular section with compression steel. Determine the design moment strength of the s ...

\( .2 \) Rectangular section with compression steel. Determine the design moment strength of the sections givign in the following table, knowing that \( f_{c}^{\prime}=4 \mathrm{ksi}, f_{y}=60 \mathrm{ksi} \), and \( d^{\prime}=2.5 \mathrm{in} \). (Answers are given in the right column. In the first four problems, \( f_{s}^{\prime}=f_{y} \) ) For problems in SI units: \( 1 \mathrm{in.}=25.4 \mathrm{~mm}, 1 \mathrm{in.}^{2}=645 \mathrm{~mm}^{2}, 1 \mathrm{ksi}=6.9 \mathrm{MPa}\left(\mathrm{N} / \mathrm{mm}^{2}\right) \), and \( 1 \mathrm{M}_{u}(\mathrm{~K} \cdot \mathrm{ft})=1.356 \mathrm{kN} \cdot \mathrm{m} \)