Consider the following set of requirements for a university information system that is used to keep track of students transcripts: The university keeps track of each student's name, student number, social security number, current address and phone, permanent address and phone, birthdate, sex, class (freshman, sophomore, ..., graduate), major department, minor department (if any), and degree program (B. A., B. S., ..., Ph. D.). Some user applications need to refer to the city, state, and zip of the student's permanent address, and to the students' last name. Each department is described by a name, department code, office number, office phone and college. Each course has a course name, description, code number, number of semester hours, level, and offering department. Each section has an instructor, semester, year, course, and section number. A grade report has a student, section, and grade. An administrator can update the courses to be taught by instructors, and enter the list of students taking a course. An instructor can enter and update the grades of the course(s) taught by this instructor. A student can request a grade report from the information system. Identify the main use cases including actors. Describe three different scenarios that can occur using sequence diagram. Provide the UML class diagram