What really does the weak entity type mean? What's the formula? Give an example. What is meant by alternative specialisation?The ER graphic shows me in what way? Give an example, then draw a matching diagram

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A: The diagram is shown below

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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.