Problem $2$: Riyadh$$s Gym $$

$$ A client is defined by a name $($unique$),$ age, phone#$,$ and email.

$$ A client has to be either a member or a non$-$member but not both.

$$ A member has a registrationDate, membershipType, and subscriptionDuration.

$$ A non$-$member has rewardPoints.

$$ A room is defined by a number $($unique$)$ and capacity. $$

$$ A trainer is defined by an ID $($unique$),$ name, age, and skillLevel.

$$ A dietitian is defined by an ID $($unique$),$ name, age, and degree.

$$ A fitness class is defined by a name $($unique$)$ and a set of times in which the class is offered.

$$ A client may take many fitness classes.

$$ A fitness class may taken by many client.

$$ A member may follow up with one dietitian.

$$ A dietitian must follow up with many members.

$$ A trainer must give many fitness classes.

$$ A fitness class is held in a room. $$

$$ A room must held by many fitness classes.

$$ A fitness class must given by many trainers. $$

$$