Design a conceptual schema (ER diagram) for doctors’ offices. The following information describes the situation that doctors’ offices database must model. Be sure to indicate all key and cardinality constraints and any assumptions you make.      Each doctor has badgeId , and name. A doctor is uniquely identified by their badgeId and may manage more than one office. An office may be managed by at most one doctor. An office has address and a phone. it is uniquely identified by its address, and it contains one or more exam rooms An exam room can be identified by its room number, and the office that it is in. Each patient has SSN, name, and phone number. Patient is uniquely identified by their SSN. When a patient visits an office, he or she has a consultation with a doctor in an examination room.

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Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.