Draw an ER diagram for the exercise and specify the primary key for each entity and the cardinality on both sides of the relationships.

A hospital has a large number of registered physicians. Attributes of PHYSICIAN include Physician_IDand Specialty. Patients are admitted to the hospital by physicians. Attributes of PATIENT include Patient_IDand Patient_Name. Any patient who is admitted must have exactly one admitting physician. A physician may optionally admit any number of patients. Once admitted, a given 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 details of the treatment. Components of Treatment_Detailinclude Date, Time, and Results.