Consider an E/R diagram which has information about students, courses, and enrollments, where Students = (Sid, Sname, address, SIN, Program) and Courses = (Cid, Cname, Credits) are the entity sets and Enrollments is a many-to-many re- lationship between them with grade as its own attribute. Give an equivalent E/R diagram (i.e., preserves the information content) in which enrollment is modeled as a weak entity set