Consider a bond that promises the following cash flows. The yield to maturity

Consider a bond that promises the following cash flows. The yield to maturity is 12%. You plan to buy this bond hold it for 2.5 years and then sell the
bond

a. What total cash will you receive from the bond after the 2.5 years? Assume that periodic cash flows are reinvested at 12%.

b. If immediately after buying this bond all market interest rates drop to 11% (including your reinvestment rate) what will be the impact on your total
cash flow after 2.5 years? How does this compare to part (a)?

c. Assuming all market interest rates are 12% what is the duration of this bond?