Assume JBH has debt with a book value of $$20$ million, trading at $120\%$ of par value. The bonds have a yield to maturity of $6\%.$ The firm has book equity of $$20$ million, and $2$ million shares trading at $$18$ per share. The firm$$s cost of equity is $12\%.$ What is JBH$$s WACC if the firm$$s marginal tax rate is $30\%?$

a$.$

$9\mathrm{.}60\%$

b$.$

$6\mathrm{.}24\%$

c$.$

$8\mathrm{.}88\%$

d$.$

$9\mathrm{.}00\%$