a) a bond has a quoted price of $915.18. It has a face value of 1,000 a semiannual coupon of 70 and a maturity of 13 years. what is the yield to maturity

b) a zero coupon bond has a quoted price of $972.14. It has a face value of 1000 and it matures in 11 years. what is the yield to maturity

c) an ordinary bond has a 14 percent coupon rate of 7.2% and makes semiannual payments. if the quoted orice of the bond is 1050 and the bond matures in 21 years what is the yield to maturity