can you explain wy part C is wrong and what is courrect answers , and please explained ?

Harold Reese must choose between two bonds: Bond X pays $76 annual interest and has a market value of $840. It has 10 years. to maturity. Bond Z pays $86 annual interest and has a market value of $800. It has three years to maturity. Assume the par value of the bonds is $1,000. a. Compute the current yield on both bonds. (Do not round intermediate calculations. Input your answers as a percent rounded to 2 decimal places.) Answer is complete and correct. b. Which bond should he select based on your answers to part a ? Bond Z Bond X c. A drawback of current vield is that it does not consider the total life Bond Z Bond X c. A drawback of current yield is that it does not consider the total life of the bond. For example, the approximate yield to maturity on Bond X is 10.18 percent. What is the approximate yield to maturity on Bond Z? The exact yleld to maturity? (Use the approximation formula to compute the approximate yiel. I to maturity and use the calculator method to compute the exact yield to maturity. Do not round intermediate calculations. Input your answers as a percent rounded to 2 decimal places.) Answer is complete but not entirely correct. d. Has your answer changed between parts b and c of this question? No Yes