At what distance behind a disabled vehicle must the warning triangle (sign of emergency stop) be placed in the event of an accident or emergency stop?

1. At least 5 meters in settlements and 10 meters outside settlements.
2. At least 15 meters in built-up areas (settlements) and at least 30 meters outside built-up areas.
3. At least 50 meters in settlements and 100 meters outside settlements.
4. Directly on the vehicle's roof.