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Required information

Column ABC has a uniform rectangular cross section and is braced in the $xz$ plane at its midpoint $C.$ Neglect the rotational stiffness of the bracing in the $xz$ plane and the lateral stiffness, of the bracing in the $yz$ plane.

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

The width $d$ of the beam is $*$ mm $.$

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