Do you need help with how to diagram the classes in your assignment? If so, can you show us what you've done so far. The forum rules do require you to show some effort before we are able to assist you.
Can you tell us what you're having trouble with specifically... we don't know where to begin helping you if you don't tell us the exact problem you are having. You've got to help us out with a little information if you want us to help you, we can't just do your assignment for you.