According to Article 47 of the Road Traffic Safety Law Implementation Regulations, what is the proper legal sequence for overtaking a vehicle ahead?

1. Accelerate immediately and pass on the right shoulder without using turn signals
2. Tailgate within 0.5 meters while revving the engine until the lead driver swerves off the road
3. Signal left, check mirrors and shoulder blind spots, sound horn or flash lights to warn the vehicle ahead, overtake on the left side with a safe lateral margin, signal right, and return to original lane once clear
4. Overtake on the left while simultaneously braking hard to test following traffic