Use ER Assistant to draw your diagram.   Draw a generalization hierarchy containing Employee, Administrator, and Faculty entities.  The Employee entity is the supertype, and the Administrator and Faculty entities are the subtypes.  The Employee entity has attributes as follows:  EmpNo (primary key), EmpName, and EmpAddress.  The Administrator entity has attributes as follows: AdmTitle,  AdmContractLength The Faculty entity has attributes as follows:  FacTenure, FacRank The generalization hierarchy should be disjoint but not complete.

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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.