Question $1$: $[7$ Marks$]$

Design a square $300mm$ braced column which has effective length $l_{ex}=l_{ey}=3\mathrm{.}00m.$ It is carrying Dead load of $975KN,$ Imposed Load of $700KN$ and $M_x=105KN.m.$ The characteristic materials strengths are $f_{cu}=30\frac{N}{m}{m}^2$ and $f_y=460\frac{N}{?}m{m}^2.$ Also draw cross section detail with scale $1$:$10.$