Please help

Section 10.3: Problem 9 (1 point) Gandalf the Grey started in the Forest of Mirkwood at a point P with coordinates (2, 3) and arrived in the Iron Hills at the point Q with coordinates (3, 8). If he began walking in the direction of the vector v = 4i + 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