What does Bono mean when he says “Some people build fences to keep people out and other people build fences to keep people in”?

1. Why does Troy always defer working on the fence?2. What does Bono mean when he says “Some people build fences to keep people out and other people build fences to keep people in”? Which character thinks of fences the first way? How about the second way?3. Why is the title of the play in the plural form “fences”? What are the different meanings discussed by the characters in the play? Consider what the fence means to Rose, Troy and Cory.4. Discuss why does Troy want Cory to drop football and get a job.