You issued debt in the form of bonds, with a face value of $$1,000,$ and have $9$ years until maturity. The bonds have an annual coupon rate of $7\mathrm{.}8\%,$ which are paid semiannually.

a$.$

The current price is $$1,100.$ 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$.,12\mathrm{.}34.)$

b$.$

The tax rate is $22\%.$ 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$.,12\mathrm{.}34.)$