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 one-to-many relative Relation B represents the entity on the "many side" of the one-to-many relationship. The delete rule b relations A and B is cascade. What happens if an attempt is made to delete a record in relation A and its primary key value appears foreign key value in one or more records of relation B? List and describe first through third normal form Indicate the normal form for this relation. If this relation is not in third normal form decompose it into points)