Chapter 4, Problem 9P

Explanation of Solution

Entity ER Diagram:

The following figure illustrates the ER Diagram for given business rules in Crow’s Foot notation:

Explanation:

The above Professional Electronics and Repairs (PEAR) ERD contains entities such as “CUSTOMER”, “REPAIR”, “DEVICE”, “PERFORM”, “SERVICE”, “PART” and “USES”.

• The relationship between the “CUSTOMER” and “REPAIR” entities is 1: M...