Determine if the collection is not well defined and therefore is not a set.
The collection of the five best U.S governors
Solution:-
A set is a collection of objects whose content can be clearly determined. The objects in a set are called the elements, or members, of the set.
Since the five bet U.S. governors are left to our own interpretation, they cannot be clearly determined. The collection is not well defined and therefore it is not a set.