Consider the column section below. It has eight # $9$ bars. The material properties are as follows: f$\_$c$^\text{'}=4,000$ psi, f$\_$y$=60$ ksi, and E$\_$s$=29,000$ ksi. The cross$-$sectional area of a #$9$ bar is $1\mathrm{.}0$ in $\mathrm{.}2.$ Consider the following hollow column section. It has the same material properties as the column section above. If the tensile strain in the reinforcing bars cannot be lower than $0\mathrm{.}0015$ when its nominal moment capacity is reached, using the principles of mechanics to determine the maximum axial load P$\_$n that can be carried by the column. $($Ans: $574$ kips$)$