A dentist office needs to create a system with following specifications. When new patients are

seen for the first time, they complete a patient information form that asks for their name,

address, phone number, and brief medical history, which are stored in the patient information

file. When a patient calls to schedule a new appointment or change an existing appointment,

the receptionist checks the appointment file for an available time. Once a good time is found

for the patient, the appointment is scheduled. If the patient is a new patient, an incomplete entry

is made in the patient file; the full information will be collected when the patient arrives for the

appointment. Because appointments are often made far in advance, the receptionist usually

mails a reminder postcard to each patient two weeks before the appointment.

c$)$ Draw context diagram of the system.

d$)$ Draw a sequence diagram for schedule new appointment.