Explain what is meant by a specialization / generalization relationship. Illustrate this term in the following scenario The Accounting department in a company keeps the information about its employees in a database. The employees are classified as part-time employees, full-time employees, and interns. Interns are usually students who work with the company during the summers. Complete the E-R diagram below by: a). Adding a unique attribute (relationship) for each entity subtype b). Adding an attribute shared by all entities c). Identifying whether the disjoint or overlap rule applies d). Identifying whether the total specialization or partial specialization rule applies