$3)(\backslash (\backslash$mathbf$\{5\}\backslash$mathrm$\{$pts$\}\backslash ))$ A compression member is $10$ ft in length and pinned on each end. The Euler buckling strength with respect to the x $-$axis is $72$ ksi $,$ the Euler buckling strength with respect the y $-$axis is $24$ ksi $,$ and the Euler buckling stress considering torsional buckling is $20$ ksi $.$ Determine the critical stress, $\backslash (\backslash$mathrm$\{$F$\}\_\{\backslash$mathrm$\{$cr$\}\}.\backslash$mathrm$\{$F$\}\_\{\backslash$mathrm$\{$y$\}\}=50\backslash$mathrm$\{$ksi$\}\backslash )$

A$.50\mathrm{.}00$ ksi

B$.17\mathrm{.}54$ ksi

C$.4\mathrm{.}52$ ksi

D$.20$ ksi

E$.24$ ksi