Problem
1. Develop a sequence diagram that shows how a clerk at a mail-order company places a customer Order. The Order accesses Inventory to check availability. Then, the Order accesses Invoice to produce a customer invoice that returns to the clerk.
2. Develop a state machine diagram that shows the states of a College Student from Potential Applicant to Graduate.
3. Develop a state machine diagram that shows the states of a Book from Concept to Publication.