Which sentence is punctuated correctly?

As the puppies ran, wrestled, and played, together, their mother watched them closely to keep them safe.

As the puppies ran, wrestled, and, played together, their mother watched them closely to keep them safe.

As the puppies ran, wrestled and, played together, their mother watched them closely to keep them safe.

As the puppies ran, wrestled, and played together, their mother watched them closely to keep them safe.