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Suppose computer science department has three entity sets instructors(i_id, name, salary), courses(course_id, course_title, credit_hours) and reference_books(book_id, book_title, first_author). a. Draw an ER diagram for the

Suppose computer science department has three entity sets instructors(i_id, name, salary), courses(course_id, course_title, credit_hours) and reference_books(book_id, book_title, first_author).

a. Draw an ER diagram for the entity sets. Please note that each course must have at least one reference book.

b. Convert the ER diagram to non-redundant relation schemas.

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