I'm not sure on part a and b either

Dennis is currently considering investing in municipal bonds that earn 9.75 percent interest, or in taxable bonds issued by the Coca- Cola Company that pay 13.00 percent. a. If Dennis's tax rate is 22 percent, which bond should he choose? Municipal bonds Taxable bonds b. Which bond should he choose if his tax rate is 32 percent? Municipal bonds Taxable bonds c. At what tax rate would he be indifferent between the bonds? c. At what tax rate would he be indifferent between the bonds? Tax rate % d. What strategy is this decision based upon? O Development planning strategy O Business planning strategy O Decision planning strategy Marketing planning strategy O Conversion planning strategy Timing strategy O Income shifting strategy