Determine whether or not the following languages are regular.

If the language is regular then give an NFA or regular expression for the language. Otherwise, use the pumping lemma for regular languages or closure properties to prove the language is not regular.

There aren't languages to analyze.

Explanation:

On the other hand, it is possible to define some concepts.

A regular language, also known as rational language, is a formal language that users can express with a regular expression (a sequence of characters that define a search pattern.) Noam Chomsky mentions that a regular language are generated by regular grammars.

On the other hand, a non-regular language cannot be defined by a regular expression, according to Peter Capello, of University of California in Santa Clara.