Philosophy Majors existentialism and jean paul sartre?

Hello guys Im in need of some help I need to have an example and explain these simple terms found in existentialism in the teachings of jean paul sartre the terms are Being In Itself Being For Itself Fundamental Desire Emperical Desire if you guys can please give me some examples and something to explain these with tied to his philosophy i will gradly appreciate it thanks much|||Read your textbook, or wikipedia!