What is the converse of the following conditional statement?

"If a person is a teenager, then the person is 13 years old or older."

Determine the validity of the converse and give a counterexample if the converse is not valid.

If a person is not a teenager, then the person is not 13 years old or older. The converse is invalid; a counterexample is a person who is 12 years old.
If a person is 13 years old or older, then the person is a teenager. The converse is invalid; a counterexample is a person who is 20 years old.
If a person is a teenager, then the person is 13 years old or older. The converse is valid.
If a person is 13 years old or older, then the person is a teenager. The converse is valid.