Jiminy's Cricket Farm issued a $30-$year, $6$ percent semiannual coupon bond $4$ years ago. The bond currently sells for $105$ percent of its face value. The company's tax rate is $23$ percent. What is the aftertax cost of debt?

$2\mathrm{.}17\%$

$4\mathrm{.}34\%$

$4\mathrm{.}33\%$

$5\mathrm{.}63\%$