Given the following database schema E-Employee (Ename, SSN, Age, salary, Supervisor _SSN, Dno) D Department (Dname, Dnumber, Dlocation, Manager_SSN, Mgr StartingDate) P Project (Pname, Pnumber, Plocation) W- Works On (ESSN, Pno, Hours) De - Dependent (ESSN, D name, DoB, Relationship) and the following set of foreign keys: EmployeeSupervisor. SSN EmployeeSSN Employee-Dno Department,Dnumber Department-Manager-SSN EmployeeSSN works-ON.ESSN Employee.SSN works-On.Pno ProjectPnumber Dependent.ESSN Employee.SSN Write the following queries in sau Find the names of all employees who work more than 15 hours on project X (Pname) Find the names of all employees who work more than 15 hours on project X (Pname), and the person should have at least one dependent; a. b