Which of the following statements are correct? i. The yield to maturity of a bond is constant throughout the life of a bond. ii. If I buy a zero-coupon bond and hold the bond to maturity, the holding period yield on this investment is equal to the initial yield to maturity. iii. If the yield curve is flat, then the yield to maturity on a discount bond is the same as the yield to maturity on a premium bond. iv. An example of a discount bond is a coupon-paying bond where the yield to maturity is more than the coupon rate. Group of answer choices