ER diagram to Schema diagram: Rectangles are entity sets, diamonds are relationship sets, rounded boxes are attributes; "(key)" marks an underlined…

ER diagram to Schema diagram:

Rectangles are entity sets, diamonds are relationship sets, rounded boxes are attributes; "(key)" marks an underlined (primary key) attribute. A thick line (===) is a double line in the diagram (total participation), and an arrow points to the "one" side of the relationship.