A long slender column ABC is pinned at ends A and C and compressed by an axial force P $($see figure$).$ At the midpoint B$,$ lateral support is provided to prevent deflection in the plane of the figure $($i$.$e$.$ the weaker axis is braced$).$ The column is a steel wide$-$flange section $($W $10$ x $45)$ with E $=30$ x $106$ psi. The distance between lateral supports is L $=18$ ft$.$ Calculate the allowable load P $($in units of kips$)$ using a factor of safety n $=2\mathrm{.}4,$ taking into account the possibility of Euler buckling about either principal centroidal axis $($i$.$e$.,$ axis $1-1$ or axis $2-2).$