How smart are you really?!?!?!?!

yeayeayea dont give me back sasses u straight A students! id bet u wont get 100% if u had a teacher! OR A BOOK! yea, i went there! >=P

1 whats open wen its closed, n closed wen its open? (EASY!)
2 u live in a 1 story house that is all green. if th couch, door, lamp, and walls are green, th stairs must be.........
3 what side of th house gets the most rain?
4 20 sheep, a sheepdog, and a shepard are in there favorite field. how many feet do they have?
5 what is da difference between a submarine n a plumbing supply house?