A college course may have one or more scheduled sections, or may not have a scheduled section. Attributes of COURSE include Course ID, Course Name,...

A college course may have one or more scheduled sections, or may not have ascheduled section. Attributes of COURSE include Course ID, Course Name,and Units. Attributes of SECTION include Section-Number and Semester-ID.Semester-ID is composed of two parts: Semester, and Year. Section-Number isan integer (such as "1" or "2") that distinguishes one section from another for thesame course but does not uniquely identify a section. How did you model SECTION? Why did you chose this way versus alternative ways to model SECTION?