The column loads are: $PD=150k$ and $P_L=200k.$ Use $KL=15ft.$ Select the lightest $W10$ section available for the loads for $Fy=50$ksi.

a$)$ Select the lightest $W12$ section available for the loads for $Fy=50$ksi

b$)$ Select the lightest satisfactory rectangular HSS $12$x$10$x$...$ section for Fy$=50$ ksi.

c$)$ Select the lightest satisfaction round HSS $12\mathrm{.}750x...$ section for $Fy=46$ksi.