What is the WACC for a firm financed with $30\%$ debt and $70\%$ equity if the debt requires an after$-$tax return of $10\%$ and equity requires a $16\%$ return?

Group of answer choices

$14\mathrm{.}8\%$

$13\mathrm{.}3\%$

$11\mathrm{.}8\%$

$14\mathrm{.}2\%$