Problem $5(20$ points$)$ Show your work:

A circular reinforced concrete column supports a $300$ kips dead load and a $350$ kips live load. All loads

are concentric. The longitudinal reinforcement is laterally confined by a continuous spiral. If the

maximum reinforcement ratio permitted by ACI, the required steel area is most nearly:

$f_c^{\text{'}}=4000,f_y=60,000$

a$)16\mathrm{.}3i{n}^2$

b$)15\mathrm{.}1i{n}^2$

c$)14\mathrm{.}6i{n}^2$

d$)12\mathrm{.}8i{n}^2$