You can invest in taxable bonds that are paying a yield of 9.3 percent or a municipal bond paying a yield of 7.55 percent. Assume your marginal tax rate is 21 percent. a. Calculate the after-tax rate of return on the taxable bond? (Round your answer to 2 decimal places. (e.g. 32.16)) b. Which security bond should you buy? Rate of return The security bond one should buy is b % You can invest in taxable bonds that are paying a yield of 8.8 percent or a municipal bond paying a yield of 7,35 percent. Assume your marginal tax rate is 28 percent. a. Calculate the after-tax rate of return on the taxable bond? (Round your answer to 2 decimal places. (e.g. 32,16)) b. Which security bond should you buy? Rate of return The security bond one should buy is b