a)can you draw the Level-0 DFD of this diagram? b)what should be written in the relationship between the restaurant owner and the food ordering system in the diagram?

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A: Lets see the solution.

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A:

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A: solution:

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A:

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A: Answer: I have done  code  and also I have attached code.

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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.