please answer using excel

QUESTION 9-CALL PROTECTION (a) How is a make-whole cal provision structured? (b) What is the difference between call protection and refunding protection? (c) Does call protection or refunding protection offer an investor greater protection against the risk that the bonds will be acquired by the issuer prior to the maturity date? QUESTION 10-EQUIVALENT TAXABLE YIELD (a) if a municipal bond trading at par has a yield to maturity of 133% and the marginal rate is 25%, what is the equivalent taxable yield? (b) If the marginal rate is increased to 45.0%, what is the equivalent taxable yield? (c) Would you expect the increase in marginal tax rates to have an effect on the price of the municipal bond? If so, would the price increase or decrease