probability of a Hockey team

Okay this one seemed a little tricky...I would realy appreciate some help. thank you!

A National Hockey League team is allowed to have 18 "skaters" (non-goalies) in uniform for any one league game. Five of these skaters are allowed on the ice at one time . There are three Forward positions and two Defense positions on the ice. Only Forwards play in the Forward positions and only Defensemen play in the Defense positions. For a particular game, the San Jose Sharks dressed 12 Forwards and 6 Defensemen. How many different stes of five players could Coach Ron Wilson put on the ice at any one time? ( hint: consider this a two satge event.) If each set of five players was equally likely to occur, what probability would you assign to each set of players?