pliz help urgently need the solution in less than $1$ hour QUESTION $3$

A column consists of two grade $300$W steel T$-$sections arranged as shown in Figure $3$

below. The column, which is $8m$ long, is so connected that it is pinned at one end and

fixed at the other end about its minor principal axis $Y-Y$ and fixed at both ends, about

its major principal axis X$-$X$.$

$3\mathrm{.}1$ Calculate the Euler buckling load for the strut $(13).$

$3\mathrm{.}2$ Calculate the failure load for the strut according to Rankine's theory $(3).$

All dimensions are in $mm.$

$y$

I

Figure $3$: $T-$ section $($Column$)$

Properties

$A=3\mathrm{.}80{10}^{3}m{m}^2$

$I_{}=2\mathrm{.}42{10}^{6}m{m}^4$

$I_{yy}=10\mathrm{.}2{10}^{6}m{m}^4$

$c_x=18\mathrm{.}8mm$

$h=104\mathrm{.}8mm$