If a traveler attends the mosque and performs the Friday prayer behind the Imam, what is the status of their prayer?

The Friday Prayer (صلاة الجمعة) Part 1: Conditions of Obligation

• The prayer is invalid; they must pray Zuhr.
• It is valid, and it fully discharges their Zuhr obligation.
• It is valid only if they repeat it as Witr.
• It is considered a voluntary prayer, and they must still pray Zuhr afterward.