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An entity-relationship model (ERD) for COMMUNICATION COMPANY MANAGEMENT SYSTEM ? Requirements FOR Entity-relationship diagram : has to have at least ( 3 Regular Entities,

An entity-relationship model (ERD) for " COMMUNICATION COMPANY MANAGEMENT SYSTEM "?

Requirements FOR Entity-relationship diagram :

has to have at least ( 3 Regular Entities, 1 Weak Entity, 3 types of relationships, and all types of attributes)

Your ERD has to include participation constraints and Cardinality ratio. Highlight any design decisions.

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