System analysis and design IT243 Assignment 2 Considering the following ER-Diagram, answer the following questions: Student Student Course SID: int Name: varchar(255) Program: varchar(255) Examination ID : int Student Course StudentSID: int Name: varchar(255) Place: varchar(255) Column a) What is the main role of an ER diagram in data modelling? b) How many courses each student can have? c) What is the relationship degree between the entities? d) Is there an associative entity, if yes can you name it? e) What is uniquely identifying the student entity table (Primary key)? StudentSID: int Marks : int Course Offerings Time: datetime Section Num: int Roomld: int CourseNo: int Semester: char(2) Year: int StudentSID: int

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