Task2: Use the data model shown below to answer the questions on the next page of this assignment. Department P" Dept No * Dept Name Dept Loc employs works for Job Assignment Assign Date Assign Hours Assign Charge PF Emp NO PF Proj NO P Job Title ----ILF Salg Grade assigned to worked by Employee P Emp No Emp Frame + Emp Lname works on Emp Status Emp Salary Emp Comm F Emp Mgr Emp No F - Job Title F Dept No Oassigned applies to - - supervises Tapplies to manages Supervised by P worked via Project Proj No Proj Name Proj Value Emp NO P Sal Grade Sal Grade Salg LoSal SalG HiSal Do managed by F a.) List the entities represented in the model. b.) Is the Department' mandatory or optional in the relationship between the 'Department and the Employee'? c.) Is the 'Employee' mandatory or optional in the relationship between the 'Employee and the Project'? d.) Identify the thirteen (out of fourteen) remaining business rules reflected in the diagram. The use of must' vs. may' is a key concept in defining the business rules. Using must' indicates the entity is required in the relationship. One business rule reflected would be: A Job may be assigned to many Employees