Draw the domain class diagrams Scenario:

Patient Administration System
A local hospital has a large number of registered physicians, each with a unique physician
number. Physicians all have at least one specialty. Patients are admitted to the hospital by
physicians. The hospital keeps track of the patients’ names and addresses, and assigns each
patient a unique patient identifier.
Any patient who is admitted must have one and only one admitting physician. Once
admitted, a patient must be treated by at least one physician. A particular physician may
treat any number of patients, or may not treat any patients. Whenever a patient is treated
by a physician, the hospital wishes to record the date and time of the treatment