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(a) Identify the main entity types of the company.
(b) Identify the main relationship types between the entity types and determine the multiplicity constraints for each relationship
(c) Identify attributes and associate them with entity or relationship types.
(d) Determine candidate and primary key attributes for each (strong) entity type.
(e) Using your answers (a) to (d) create a single ER diagram. State any assumptions necessary to support your design.
What are object interaction diagrams? Object interaction diagrams are the diagrams that used to describe order in which messages are communicated in execution of an operation,
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i want to database for online assignment submission system
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