Answer
See the explanation
Work Step by Step
a.
- Class X represents tools because it is labeled as "Tool" and is associated with users and manufacturers.
- Class Y represents users because it is labeled as "User" and is associated with tools.
- Class Z represents manufacturers because it is labeled as "Manufacturer" and is associated with tools.
b. Yes, a tool can be used by more than one user since there is a many-to-many association between the Tool class (X) and the User class (Y).
c. No, a tool cannot be manufactured by more than one manufacturer since there is a one-to-many association between the Tool class (X) and the Manufacturer class (Z).
d. Yes, each user can use tools manufactured by many manufacturers because there is a many-to-many association between the User class (Y) and the Tool class (X), and a one-to-many association between the Tool class (X) and the Manufacturer class (Z).
