3. (15 points) Use the ER diagram of a company database system below to answer the following questions: Frame Minist r ame Bdule N ame Address Salary San Location WORS_FORAN 11. Humber Dewan Start_dale Number_of_employ D EPARTMENT Com MANAGES > (1.0 Dependent DEPENDENT Nome Se Birth date Relationship (a) (5pts) List the strong (nonweak) entity types in the ER diagram. (b) (5pts) Is there a weak entity type? If so, give its name, its partial key, and its identifying relationship. What constraints do the partial key and the identifying relationship of the weak entity type specify in this diagram? (c) (5pts) For EMPLOYEE entity, which attribute is composite? Which attribute(s) is the key? Specify the (min, max) constraint on each participation of an entity type in the WORS FOR relationship