F$13-3.$ The A$-36$ steel column can be considered pinned at its top and bottom and braced against its weak axis at the mid$-$height. Determine the maximum allowable force $P$ that the column cas support without buckling. Apply & F$.$S$.=2$ against bucklise, Thke $A=7\mathrm{.}4({10}^{-3})m^2,I_x=87\mathrm{.}3({10}^{-6})m^4,$ and $($:$I_y=18\mathrm{.}8,{10}^{-6}$