Merge the ER model created for Exercise 9.13 to the ER model (representing the data merged requirements for the Member, Assistant, and Manager user views of the StayHome Online Rentals case study) shown in Figure 9.12 using the optional Step 2.6 of the database design methodology given in Appendix D.

Exercise 9.13

Create an ER model for the PerfectPets case study described in Appendix B. (If appropriate, use the enhanced ER concepts.)