please do it quickly, i do rates

Bonus Question: Suppose person A purchases an annual coupon bond with a $1,000 face value and 20-year maturity and a coupon rate of 8%. After 4 years person A sells to person B. The interest rate at the time of that sale is 9%. Person B holds onto the bond for 2 years and then sells to person C. At the time of that sale the interest rate is back down to 8%. What annual rate of return does person B earn? (you can solve this without a calculator) less than 8% 8% between 8% and 9% 9% more than 9%