need help with the solution

Problem 9. (1 point) Gandalf the Grey started in the Forest of Mirkwood at a point P with coordinates (2, -1) and arrived in the Iron Hills at the point O with coordinates (4, 4). If he began walking in the direction of the vector v = 5i + 1j and changes direction only once, when he turns at a right angle, what are the coordinates of the point where he makes the turn? Answer(s) submitted