needs to find answers

Using the text book and power point on Interest Groups, please answer 3 of the 4 following questions. 

1. Define and explain the relationship in power between interest groups and political parties.
2. Identify the different types of interest groups. Which interest groups are most powerful in Oregon? 3. What are the roles of interest groups and different tactics used by interest groups.
4. What is a lobbyist? What do they do? 

I attached the powerPoint.