A taxable bond has a coupon rate of $5\mathrm{.}08$ percent and a YTM of $5\mathrm{.}39$ percent. If an investor has a marginal tax rate of $30$ percent, what is the equivalent aftertax yield?

Multiple Choice

$3\mathrm{.}77\%$

$3\mathrm{.}56\%$

$5\mathrm{.}63\%$

$7\mathrm{.}70\%$

$7\mathrm{.}26\%$