What are the immediate, reflexive actions that must be executed simultaneously by the crew when someone shouts '¡Hombre al agua!' (Man Overboard)?

1. Shout the side of the fall, throw a lifebuoy with light/smoke toward the victim, press the GPS 'MOB' button, and assign a dedicated lookout to keep pointing continuously at the person
2. Immediately hoist all sails and turn off the VHF radio to avoid radio noise
3. Jump into the water immediately without a lifejacket to swim after the casualty
4. Put the engine in full reverse without checking propeller clearance