Eskimo is expected to pay a $$2\mathrm{.}00$ dividend at year end $($D$1=$ $$2\mathrm{.}00),$ the dividend is expected to grow at a constant rate of $4\mathrm{.}50\%$ a year, and the common stock currently sells for $$47\mathrm{.}00$ a share. The before$-$tax cost of debt is $6\mathrm{.}50\%,$ and the tax rate is $40\%.$ The target capital structure consists of $45\%$ debt and $55\%$ common equity. What is the company$$s WACC if all the equity used is from retained earnings?

$5\mathrm{.}98\%$

$6\mathrm{.}57\%$

$7\mathrm{.}22\%$

$6\mathrm{.}91\%$

$5\mathrm{.}77\%$