I need help with this problem i have the correct answer for part A, but i cant figure out the rest of the problem. Thanks for the help.

A newly issued bond pays its coupons once a year. Its coupon rate is 5.7%, its maturity is 15 years, and its yield to maturity is 8.7% a. Find the holding-period return for a one-year invest ment period if the bond is selling at a yield to maturity of 7.7% by the end of the year. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Holding-period return 17.96 % b. If you sell the bond after one year when its yield is 7.7%, what taxes will you owe if the tax rate on interest income is 40% and the tax rate on capital gains income is 30%? The bond is subject to original-issue discount (OID) tax treatment. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Tax on interest income Tax on capital gain Total taxes 77.27 4.6 40.61 c. What is the after-tax holding-period return on the bond? (Do not round intermediate calculations. Round your answer to 2 decimal places.) After-tax holding-period return 19.54 % d. Find the realized compound yield before taxes for a two-year holding period, assuming that () you sell the bond after two years. (i) the bond yield is 7.7% at the end of the second year, and (iii) the coupon can be reinvested for one year at a 3.7% interest rate. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Realized compound yield before taxes 7.21 % e. Use the tax rates in part (b) to compute the after-tax two-year realized compound yield. Remember to take account of OID tax rules. (Do not round intermediate calculations. Round your answer to 2 decimal places.) After-tax two-year realized compound yield 11%