Problem 6-8 (LG 6-2) You can invest in taxable bonds that are paying a yield of 8.7 percent or a municipal bond paying a yield of 725 percent. Assume your marginal tax rate is 21 percent. a. Calculate the after-tax rate of return on the taxable bond? (Round your percentage answers to 2 decimal places. (0.9. 32.16)) b. Which security bond should you buy? Rate of return % b. The security bond one should buy is