At t = 0 you buy a 10-year, 5% coupon bond, when the bond's YTM is Z, where Z is greater than 5%. Each time you receive a coupon you invest and rollover that coupon at an annual rate of 5%. At t = 4 you sell the bond and the bond's YTM is still equal to Z. Which of the following statements is necessarily true about the realized compound yield from t = 0 to t = 4? The realized compound yield is equal to Z The realized compound yield is equal to 5% The realized compound yield is greater than Z OThe realized compound yield is lower than Z None of the above