Convert into indirect speech: The stranger said to me, 'Could you please tell me the way to the station?'

1. ক
   The stranger asked me to tell him the way to the station.
   
2. খ
   The stranger requested me to tell him the way to the station.
   
3. গ
   The stranger asked me if I could tell him the way to the station.
   
4. ঘ
   The stranger asked me whether I would tell him the way to the station.