Required information

Column $\backslash ($ A B C $\backslash )$ has a uniform rectangular cross section and is braced in the $\backslash ($ x z $\backslash )$ plane at its midpoint $\backslash ($ C $\backslash ).$ Neglect the rotational stiffness of the bracing in the $\backslash ($ x z $\backslash )$ plane and the lateral stiffness of the bracing in the $\backslash ($ y z $\backslash )$ plane.

Using the ratio found in part $\backslash ($ a $\backslash ),$ design the cross section of the column so that the factor of safety will be $3\mathrm{.}0$ when $\backslash ($ P$=4\mathrm{.}8\backslash$mathrm$\{$kN$\},$ L$=1\backslash )$ m $,$ and $\backslash ($ E$=200\backslash$mathrm$\{$GPa$\}\backslash ).($Round the final answers to two decimal places.$)$

The width $\backslash ($ d $\backslash )$ of the beam is mm$.$

The depth $\backslash ($ b $\backslash )$ of the beam is mm$.$