Determine the available compressive strength per LRFD for:

a$)$ A W$12$x$72$ A$992$ column when the effective length is $20$ ft about y$-$axis and $40$ ft about x$-$axis.

b$)$ An HSS $5$x$5$x$3/8$ A$500$ Grade C column when the effective length is $10$ ft about the y$-$axis and $15$ ft

about the x$-$axis.

c$)$ For both a and b identify if this is an elastic or inelastic buckling condition.

d$)$ Describe a common condition $($i$.$e$.,$ element in a particular structure$)$ where the effective length is

different about the axes