You have discovered that when the required rate of return on a bond you own fell by 0.5 percent from 8.9 percent to 8.4 percent, the fair present value rose from $945 to $955. The bond pays interest annually. What is the duration of this bond? Assume annual payments. (Do not round Intermediate calculations. Round your answer to 1 decimal place. (e.g., 32,1)) Duration of this bond 2.1 years