h. EM c. STUDENT: Student Type (Grad, Under 3-29. For simplicity, subtype discriminators were left off many figures in this chapter . Add subtype discriminator nota- tion in each figure listed below. If necessary, create a new attribute for the discriminator. a. Figure 3-2 Chapter this E-R clusters. used. 3-28. Refert Develo 3 - The Enhanced E- Model FIGURE 3-2 Employee Supertype with three su EMPLOYEE Employee Number Employee Name Address Date Hired CONSULTANT HOURLY EMPLOYEE Hourly Rate SALARIED EMPLOYEE Annual Salary Stock Option Contract Number Billing Rate Figure 3-2 shows a representation of the EMPLOYEE supertype with its three subtypes, using enhanced ER notation. Attributes shared by all employees are associ- ated with the EMPLOYEE entity type. Attributes that are peculiar to each subtype are