After going through extensive analysis, the company has decided to target $30\%$ debt and $70\%$ equity based on market values. This strategy is expected to increase the cost of equity to $13\%,$ assuming the pre$-$tax cost of debt $7\%.$

What is the target WACC?

$13\mathrm{.}10\%$

$10\mathrm{.}68\%$

$7\mathrm{.}90\%$

$11\mathrm{.}20\%$