What are the three different degrees of relationship? Describe the business rules that the following picture depicts Describe the business rules that the following picture depicts Explain many to many relationships and how to deal with them in design. Describe referential integrity. Describe in detail the three delete rules. Consider relations A and B. Relation A represents the entity on the "one side" of a Relation B represents the entity on the "many side" of the one-to-many relationship, relations A and B is cascade