Problem 10-18 Yield to maturity-calculator or Excel required [LO10-3] Bonds issued by the Coleman Manufacturing Company have a par value of $1,000, which of course is also the amount of principal to be paid at maturity. The bonds are currently selling for $780. They have 10 years remaining to maturity. The annual interest payment is 9 percent ($90) Compute the yleld to maturity. (Do not round intermediate calculations. Input your answer as a percent rounded to 2 decimal places.)