If I want to overtake the vehicle in front of me, I am obliged to make sure that I can carry out the maneuver without the danger of hitting vehicles traveling in the opposite direction.?
No, but I must make sure that there is no danger in carrying out the maneuver.
Yes, it is one of the rules I must follow before starting the overtaking maneuver.
Yes, but only when I make the overtaking maneuver on the right side.