Sunrise, Incorporated, is trying to determine its cost of debt. The firm has a detiot issue outstanding with $12$ years to maturity that is quoted at $111\mathrm{.}5$ percent of face value. The issue makes semiannual payments and has an embedded cost of $8\mathrm{.}4$ percent annually.

a$.$ What is the company's pretax cost of debt?

Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

b$.$ If the tax rate is $25$ percent, what is the aftertax cost of debt?

Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$\backslash$table$[[$a$.$ Pretax cost of debt,,$\%$