At the present time, Omni Consumer Products Company (OCP) has 10-year noncallable bonds with a face value of $1,000 that are outstanding. These bonds have a current market price of $1,278.41 per bond, carry a coupon rate of 11%, and distribute annual coupon payments. The company incurs a federal-plus-state tax rate of 25%. If OCP wants to issue new debt, what would be a reasonable estimate for its after-tax cost of debt (rounded to two decimal places)? (Note: Round your YTM rate to two decimal place.)

a) 4.22%

b) 5.27%

c) 6.32%

d) 4.74%