$5\mathrm{.}6.$ Determine the required reinforcements for a $12in.12in.$ tied reinforced concrete column subjected to a dead load of $20$ kip and a roof live load of $30$ kip $.$ Assume that the loads have small eccentricity. Use $f_c^{\text{'}}=5,000f_y=60,000,$ and $2$ in $.$ clear cover.