A 20-year maturity bond with face value of $1,000 makes annual coupon payments and has a coupon rate of 8.80%. (Do not round intermediate calculations. Enter your answers as a percent rounded to 3 decimal places.) a. What is the bond's yield to maturity if the bond is selling for $980? Yield to maturity % b. What is the bond's yield to maturity if the bond is selling for $1,000? Yield to maturity % c. What is the bond's yield to maturity if the bond is selling for $1,180? Yield to maturity %