Suppose you are in charge of designing a database for patients in a hospital. Each patient has an ID, name, admission date, and a responsible physician each physician has a unique physician ID. A patient must either be an outpatient or a resident patient. The hospital keeps track of the checkback date of each outpatient and date discharged for each resident patient. Create an EER model for this system. In your EER diagram, specify both disjointness and completeness constraints.