Billick Brothers is estimating its WACC. The company has collected the following information:

Its capital structure consists of $28$ percent debt and $72$ percent common equity. The company has $13-$year bonds outstanding with a $8\mathrm{.}5$ percent annual coupon that are trading at par.

The company's tax rate is $32$ percent.

The risk$-$free rate is $4\mathrm{.}3$ percent.

The market risk premium is $3\mathrm{.}5$ percent.

The stock's beta is $1\mathrm{.}1.$

What is the company's WACC?

$6\mathrm{.}39\%$

$7\mathrm{.}49\%$

$7\mathrm{.}19\%$

$6\mathrm{.}89\%$

$6\mathrm{.}69\%$