Problem
You are an analyst that has been assigned to work on developing a system for a dentist's office. In discussions, you see that there are three key use cases that you can get started on: 1. Patients need to make or change appointments 2. The office receptionist needs to collect key information from the patient when they arrive for their appointment 3. Send out reminders for appointments two weeks prior. Develop and show these three use cases and then use that information to develop a level 0 DFD.