$(5)$ The Ultimate design moment to be resisted by the section shown $($breadth

and effective depth are $260mm$ and $440mm)$ is $185kNm.$ Determine the

Area of tension reinforcement $($As$)$ required, where $F_y=460\frac{N}{m}{m}^2$ and

$F_{cu}=30\frac{N}{m}{m}^2$

NOTE: draw all designed sections with all geometric properties