Design an Entity-Relationship for each system described below. Use the (min,max) notation. State clearly any additional assumptions you make. Give the relational model by applying the mapping rules (WITH REFERENCES AND ARROWS). NOTE: USE CHEN ER DIAGRAM (YOU CAN USE VISIO MICROSOFT(TEMPLATE=CHEN) ONLY SHOWING THE ENTITIES/ATTRIBUTES/WEAK ENTITIES/RELATIONSHIPS/PRIMARY KEY-FK/ (MIN-MAX) NOTATIONS ALSO NOT FORGETTING THE REFERENCES ON THE MAPPING TABLES WITH ARROWS REFERRING THE FOREIGN KEYS. YOUR WORK SHOULD BE SPECIFIC WITH JUSTIFICATION.   We want to build a database for a community of paleontologists, storing information about the fossils kept in different museums. Each fossil is described by the year and place of discovery, the name of the paleontologist who discovered it, the room where it is exposed, and the presumed species. Each fossil may be assigned to different species with different degrees of probability. Museums are characterized by their rooms, their paleontologists and the director (should be a paleontologist).

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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.