What does the yellow and red striped flag mean during Endurance and Autocross Event?

1. The track is slippery or something is on the racing surface that should not be there. The driver must be prepared for evasive maneuvers to avoid the situationCorrect
2. Mechanical black flag. The driver must pull into the driver change area for a mechanical inspection of the vehicle, something has been observed that requires a closer inspection.
3. The driver must pull into the driver change area for discussion with the officials concerning an incident. A time penalty may be assessed.
4. The driver must be prepared to overtake a slower car on the racing line.