1. A municipal bond has a YTM of 5.19 percent while the YTM of a comparable taxable bond is 7.78 percent. What is the tax rate that will make an investor indifferent between the municipal bond and the taxable bond?

2. The App Store needs to raise $2.8 million for expansion. The firm wants to raise this money by selling 20-year, zero-coupon bonds with a par value of $1,000. The market yield on similar bonds is 6.49 percent. How many bonds must the company sell to raise the money it needs? Assume semiannual compounding.