iminy$$s Cricket Farm issued a bond with $20$ years to maturity and a semiannual coupon rate of $4$ percent $6$ years ago. The bond currently sells for $95$ percent of its face value. The company$$s tax rate is $25$ percent.

a$.$

What is the pretax cost of debt? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ What is the aftertax cost of debt? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$