Entity Relationship Diagram

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(s), timings, and classroom; • students, including student-id, name, and program; • instructors, including identi-cation number, name, department, and title. Further, the enrollment of students 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 registrar9s of-ce.Document all assumptions that you make about the mapping constraints. 2. Design an E-R diagram for keeping track of the exploits of your favorite sports team. You should store the matches played, the scores in each match, the players in each match and individual player statistics for each match. Summary statistics should be modeled as derived attributes &to track the same information for all teams in a league. 3. Construct an E-R diagram for a car-insurance company whose customers own one or more cars each. Each car has associated with it zero to any number of recorded accidents.