Each landscaper is assigned clients. However, when they first start, a landscaper is not assigned any clients while they are training. Each client is asked if they have a preferred landscaper. If they have no preference, a landscaper is assigned to them that becomes their preferred landscaper. Of course, they can switch their preferred landscaper at any time.

$$ Include relationships and ER language.

It has been determined that some clients do not want a preferred landscaper and are willing to have whoever is available during their appointment. As a result, if a client prefers a specific landscaper, it is recorded. Otherwise, a client is not assigned a landscaper.

$$ Modify the previous data model.