The Two Dollar Store has a cost of equity of $11\mathrm{.}5$ percent, the YTM on the company's bonds is $6\mathrm{.}1$ percent, and the tax rate is $21$ percent. If the company's debt$-$equity ratio is $\mathrm{.}50,$ what is the weighted average cost of capital?

Multiple Choice

$9\mathrm{.}50\%$

$8\mathrm{.}46\%$

$6\mathrm{.}31\%$

$9\mathrm{.}27\%$

$7\mathrm{.}75\%$