Solve Problems # $5-9$

Determine ${}_c{P}_n,$ and $\frac{P_n}{{}_c}$ for each of the columns, using the AISC Specification and $F_y=50$ksi, unless noted otherwise.

a$.$ W$12120$ with $KL=18ft.($Ans$.1120k$ LRFD; $744k$ ASD$)$

b$.$ HP$1042$ with $KL=15ft.($Ans$.371k$ LRFD; $247k$ ASD$)$

c$.$ WT$850$ with $KL=20ft.($Ans$.294$ k LRFD; $196$ k ASD$)$