ABC, Inc.$\text{'}$s target capital structure is $20\%$ debt, $35\%$ preferred, and $45\%$ common equity. The before$-$tax cost of debt $($RD$)$ is $7\mathrm{.}71\%,$ the cost of preferred stock $($RP$)$ is $10\mathrm{.}79\%,$ and the cost of common stock $($RE$)$ is $27\mathrm{.}47\%.$ If the tax rate is $16\%.$ What is the WACC?