Chapter 5 6. Calculate the percentage return on a 1-year Treasury bill with a face value of $10,000 if you pay $9,800 to purchase it and receive its full face value at maturity. 7. Calculate the after-tax return of a 4.65 percent, 20-year, A-rated corporate bond for an investor in the 10 percent marginal tax bracket. Compare this yield to that of a 3.25 percent, 20-year, A-rated, tax-exempt municipal bond, and explain which alter- native is better. Repeat the calculations and comparison for an investor in the 25 percent marginal tax bracket