Draw the preliminary class diagram for the system described in the following requirements (the cardinality of the relationships is optional).

Question Two

Redraw the following class diagram into the equivalent E-R diagram.

Question Three

Convert the following E-R diagram, which represent a manufacturing system into relations. Make sure to specify all the primary keys.

Question Four

Identify all foreign keys in relations you identified in Question 3 and justify your decisions.

 


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