he following ER diagram shows the relationships between a personal trainer and customers at

a gym.

Determine whether each of the following is true or false, given the constraints reflected by the

above ER diagram. No justification is required. $(2$ points each$)$

a$)$ There can be a personal trainer that does not train any customers.

True $/$ False

b$)$ Every customer must have a personal trainer.

True $/$ False

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$3$