When an occupant is trapped inside a severely crushed vehicle wreckage following a crash, what actions should first aiders take while awaiting the fire rescue hydraulic cutting team?

1. Use crowbars to violently wrench the victim's trapped limbs out
2. Turn off the vehicle ignition, disconnect battery cables if accessible to eliminate fire risk, comfort and monitor the casualty, protect their airway, and stabilize their head and neck (关闭点火开关、安抚伤员、等待破拆救援)
3. Set fire to the upholstery to create warmth
4. Pull the trapped victim's arms forcefully with a tow truck