1996 O 17% Question 20 1 pts An investor purchases one municipal bond and one corporate bond that pay rates of return of 5% and 6.4%, respectively. If the investor is in the 15% tax bracket, his after-tax rates of return on the municipal and corporate bonds would be, respectively, 596 and 6.4% O 5.75% and 5.44% 0 4.25% and 6.4% O 5% and 5.44%