Urgently need answer to the following (with respect to the assignment):
1) Single class diagram or multiple?
2) How many classes (approx range)?
3) Does one need to use extension mechanism to use, e.g. EJB 3.x?
4) Does anyone know how to escalate issues that are not being responded to by Sun Education?
Generally it is not recommended to split class diagram. Personally I had one class diagram with 20-25 classes and one small class diagram for security and authorization related objects. My main class diagram does not include some of pattern implementations, e.g. factories and JSF managed beans (they are on sequence diagram)
What extension mechanism do you mean? I am not familiar with that.
About number 4 - I you ask about details that are not clear from the task, you can propose your own vision in the assumptions section