Five Years Ago,Peter Pander Bought a 10-Year Bond That Pays

Five years ago,Peter Pander bought a 10-year bond that pays 8 percent semi-annually for $981.10.It has a face value of $1,000.Today,he sold it for $1,067.22.What is the realised yield on his investment?

A) 6.41%.
B) 4.78%.
C) 8.72%.
D) 9.56%.