Take It All Away has a cost of equity of $10\mathrm{.}45$ percent, a pretax cost of debt of $5\mathrm{.}21$ percent, and a tax rate of $21$ percent. The company's capital structure consists of $65$ percent debt on a book value basis, but debt is $25$ percent of the company's value on a market value basis. What is the company's WACC?

Multiple Choice

$8\mathrm{.}17\%$

$9\mathrm{.}14\%$

$8\mathrm{.}87\%$

$9\mathrm{.}75\%$

$12\mathrm{.}39\%$