A 4.85 percent coupon municipal bond has 22 years left to maturity and has a price quote of 103.70. The bond can be called in eight years. The call premium is one year of coupon payments. (Assume interest payments are semiannual and a par value of $5,000.)

1. Current Yield = 4.68%

2. Yield to Maturity = 4.58%

3. Equivilent Taxable Yield = 7.05%

4. Yield to Call = ?????

Number 4 is the only question I am having trouble with, the Yield to Call.