answer the question in 4 or more sentences.

Phase 6.4 Object Modeling with the Unified Modeling Language CASE IN POINT 62: TRAIN THE TRAINERS, INC. Train the Trainers develops seminars and workshops for corporate training managers, who in turn train their employees. Your job at Train the Trainers is to put together the actual training materials. Right now, you are up against a deadline. The new object modeling seminar has a chapter on cardinality, and the client wants you to come up with at least three more exam- ples for each of the four cardinality categories listed in Figure 6-17 zero or many, zero or one, one and only one, and one or many. Even though you are under pres- sure, you are determined to use examples that are realistic and familiar to the students. What examples will you submit? . The four categories are