Jiminy's Cricket Farm issued a $20-$year, $4\mathrm{.}2$ percent semiannual bond $3$ years ago. The bond currently sells for $89$ percent of its face value. The company's tax rate is $22$ 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$.,32\mathrm{.}16.)$