Assume that 10 years ago you purchased a $1,000 bond for $855. The bond pays 6.25 percent interest and will mature this year. (a) Calculate the current yield on your bond investment at the time of the purchase. (Enter your answer as a percent rounded to 2 decimal places.) (b) Determine the yield to maturity on your bond investment at the time of purchase. (Enter your answer as a percent rounded to 2 decimal places.)