this problem is incorrect and i need help

A bond with a coupon rate of 8 percent selts at a yield to maturity of 10 percent. If the bond matures in 12 years, what is the Macaulay duration of the bond? What is the modified duration? (Do not round intermediate calculations. Round your answers to 3 decimal places.) Answer is complete but not entirely correct. A bond with a coupon rate of 8 percent selts at a yield to maturity of 10 percent. If the bond matures in 12 years, what is the Macaulay duration of the bond? What is the modified duration? (Do not round intermediate calculations. Round your answers to 3 decimal places.) Answer is complete but not entirely correct