1. Study your answer to Question 1. Verify that the relations you say represent the Petrie’s Electronics database are in third normal form. If they are, explain why. If they are not, change them so that they are.
2. The E-R diagram you developed in questions in the Petrie’s Electronics case at the end of
Chapter 7 should have shown minimum cardinalities on both ends of each relationship. Are minimum cardinalities represented in some way in the relations in your answer to Question 2? If not, how are minimum cardinalities enforced in the database?