a. How many tables would be required in a relational database of the second REA model? Justify your response.

b. For each table indicated by the second REA model, indicate: its name, its primary key and at least two additional fields.

c. Update the second REA model by adding the event “revise book.” Create appropriate cardinalities. Indicate any additional table(s) that would be required; specify needed primary and foreign keys for any additional tables.