1. Describe some typical pairs of entities that you think might be common in business, and describe their relationships, whether many-to-many, one-to-many, many-to-one, or one-to-one. Explain why you think that a particular relationship applies to that pair of entities.
2. Let's start with what are business rules?
Class let help each other better under stand relationships while using the Business rules.
Why are they important to a database designer?