Urgent HELP needed on 3 problems!

Hi I have real difficulties with the following three problems, any help will be appreciated.

**Write a system of linear inequality that describes the shaded region:**

http://img230.imageshack.us/img230/512/image005p.jpg

**Determine graphically the solution set for the system of inequality and indicate whether the solution is bounded or unbounded:**

http://img150.imageshack.us/img150/3479/image008a.jpg

Solve the linear programming problem by the method of corners:

http://img81.imageshack.us/img81/1212/image009i.jpg

Sorry for the poor picture quality but they are made by phone :(

Thank you all in advance!