A university registrar's office maintains data about the following entities: courses including number, title, credits, syllabus, and prerequisites; course offerings, including course number, year,...

Extracted text: A university registrar's office maintains data about the following entities: courses including number, title, credits, syllabus, and prerequisites; course offerings, including course number, year, semester, section number, instructor, timings, and classroom; students, including student- id, name, and program; and instructors, including identification number, name, department, and title. Further, the enrollment ofstudents in courses and grades awarded to students in each course they are enrolled for must be appropriately modeled. Construct an E-R diagram for the registrar's office. Document all assumptions that you make about the mapping constraints.