Нужно составить пять видов вопросов на языке к данному предложению. john leach, a survival instructor, has studied the behaviour of people in disasters around the world for several decades.

Who is John Leach?
How time John Leach Studied the behaviour of pepole in disasters ?
What John leach do for several decades?
Why John Leach studied the behaviour of people in disasters?
Who studied the behavior of people in disasters?