I need help with questions 5.14,5.15,5.16,5.18.

solution: https://www.chegg.com/homework-help/Database-Systems-6th-edition-chapter-5-problem-10E-solution-9780132943260

TextBook: database systems a practical approach to design implementation and management 6th

5.13 Using relational algebra, create a view of all rooms in the Grosvenor Hotel, excluding price details. What are the advantages of this view? The following tables form part of a database held in an RDBMS: Employee (empNo, fName, IName, address, DOB, sex, position, deptNo) Department (deptNo, deptName, mgrEmpNo) Project (projNo, projName, deptNo) WorksOn (empNo, projNo, dateWorked, hoursWorked) where Employee contains employee details and empNo is the key. Department contains department details and deptNo is the key. mgrEmpNo identifies the employee who is the manager of the department. There is only one manager for each department. Project contains details of the projects in each department and the key is projNo (no two departments can run the same project). and WorksOncontains details of the hours worked by employees on each project, and empNo/projNo/dateWorked form the key. Formulate the following queries in relational algebra, tuple relational calculus, and domain relational calculus. 5.14 List all employees. 5.15 List all the details of employees who are female 5.16 List the names and addresses of all employees who are managers. 5.17 Produce a list of the names and addresses of all employees who work for the IT department. 5.18 Produce a list of the names of all employees who work on the SCCS project