Now more and more foreign  families move to Yiwu. The Kings is one of them. The King family is from an Arabic Country. Mr King is a businessman. Mrs King is 35 years old , five years younger than  her husband. She is a teacher. They have two children. Tony, their son,is a student. He is 10. He studies in Wuai Primary school. Tony has got a sister, Alice. She is 5 years old. They like Yiwu very much. How old is Mr King?
30. 35. 40 45.