Answer:
A well defined-set means the element is a member of the set or not. This set is consist of the first four odd numbers. That is a well-defined set. This set is consist of two distinct dishes.
A finite set in mathematics is a set that has a finite number of elements. In simple words, it is a set that you can finish counting. For example, {1,3,5,7} is a finite set with four elements. The element in the finite set is a natural number, i.e. non-negative integer.