ExcelCollege has many departments such as computer science, business administration and social science. Each department)has many (employees) which includes technical staffs, administrators, and lecturers. Technical staffs have a work level classification, such as level 1 for technicians and level 2 for IT officers. Administrators have a position title. The lecturers also consist of three different ranks which is senior lecturer, associate professor, and professor. The lecturers are required to state their research area of expertise. Other than that, all employees have the basic attributes such as employee ID, employee name and employee date of birth. Draw an extended entity relationship (EER) diagram based on the scenario above. You are required to use specialization hierarchy whichever appropriate. Make sure you identify and include all primary keys and foreign keys where appropriate