Question: 1 - a - ) What are the referential integrity constraints in this model? Write them in the form of FK - - - >

1-a-) What are the referential integrity constraints in this model? Write them in the form of FK--->PK.
Assume that the value of MGR in the last row is NULL.
Hint: A PK may consist of more than one attribute.
b-) Transform this relational database model to its equivalent E/R model.
Hint: Notice which tables transform to entities and which tables to relationships. Do not forget to
specify the cardinality constraints in(max,min) notations.
1-a-) What are the referential integrity constraints in this model? Write

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