Calculate the after-tax return of a 4.65 percent, 20 year, A-rated corporate bond for an investor in the 15 percent marginal tax bracket. Compare this yeild to that of a 3.25 percent, 20 year A-rated, tax exempt municipal bond, and explain which alternative is beter. Repeat the calculations and comparison for an investor in the 33 percent marginal tax bracket.

Can you please solve this for me and show me how you came up with the answer?

Thanks!