Task 1 : Construct an E-R diagram for the following system : A university registrars ofce maintains the registration's system data considering the following:

1. Courses: including (Number, Title, Credit_Hours, Syllabus, and Prerequisites)
2. Sections: including (Course_Number, Year, Semester, Section_Number, Instructor(s), Timings, and Classroom)
3. Students: including (Student_id, Name, and Program)
4. Instructors: including (Identication_number, Name, Department, and Title).
5. The students' enrollment within courses and grades awarded for each student in each course.