Problem
1. Give an example of a data constraint.
2. Give an example of a business rule that would need to be documented in a database development project.
3. Define the term entity and give an example other than those used in this book.
4. Explain the difference between an entity class and an entity instance.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.