culture as a centripetal/centrifugal force

1) Define culture
2) Define ethnocentrism
3) Define cultural relativism
4) Explain TWO ways that culture can act as a centripetal force
5) Explain TWO ways that culture can act as a centrifugal force
6) Describe ONE example of a country where cultural similarities between citizens act as a centripetal force
7) Describe ONE example of a country where cultural differences between citizens act as a centrifugal force

just answer these questions please
remember key word is citizens for 6 & 7. GCC countries with large expat worker populations are not a good example.