A rectangular beam has the following properties: width, $b=320mm,$ effective depth, $d=578mm,$ Tension Bars, As $=10-28mm,$ Compression Bars, A$\text{'}$s $=2-25mm,d^{\text{'}}=42\mathrm{.}5mm.$

Determine the dosign strength of the beam, Use fy $=415$MPa and $f^{\text{'}}c=21$MPa. Use NSCP

a$.619\mathrm{.}27kN-m$

b$.626\mathrm{.}179kN-m$

c$.627\mathrm{.}169kN-m$

d$.,672\mathrm{.}196kN-m$