1. Create a view called EMPLOYEES_VU based on the employee numbers, employee names, and department numbers from the EMPLOYEES table. Change the heading for the employee name to EMPLOYEE. 2. Display the contents of the EMPLOYEES_VU view. 3. Select the view name and text from the USER_VIEWS data dictionary view. Note: Another view already exists. The EMP_DETAILS_VIEW was created as part of your schema. Note: To see more contents of a LONG column, use the iSQL*Plus command SET LONG n, where n is the value of the number of characters of the LONG column that you want to see. 4. Using your EMPLOYEES_VU view, enter a query to display all employee names and department numbers. 5. Create a view named DEPT50 that contains the employee numbers, employee last names, and department numbers for all employees in department 50. Label the view columns EMPNO, EMPLOYEE, and DEPTNO. Do not allow an employee to be reassigned to another department through the view. 6. Display the structure and contents of the DEPT50 view. 7. Attempt to reassign Matos to department 80. 8. Create a view called SALARY_VU based on the employee last names, department names, salaries, and salary grades for all employees. Use the EMPLOYEES, DEPARTMENTS, and JOB_GRADES tables. Label the columns Employee, Department, Salary, and Grade, respectively.