While reversing a car in an apartment complex parking lot (a place that is not a road), you hit and injure a passer-by. Which of the following is correct?

1. ①Since it is not a road, the accident-response duties of the Road Traffic Act do not apply
2. ②As long as you tell the complex management office, the driver has nothing else to do
3. ③Even though it is not a road, you must stop at once, help the injured person and give the victim your personal details
4. ④If the injured person can walk alone, you need not help them