Required: a. Find the duration of a 6% coupon bond making annual coupon payments if it has three years until maturity and a yield to maturity of 7.7%. (Do not round intermediate calculations. Round your answers to 4 decimal places.) b. What is the duration if the yield to maturity is 11.7%? (Do not round intermediate calculations. Round your answers to 4 decimal places.) YTM Duration a. 7.7% YTM Years b. 11.7% YTM Years