I need help to solve this question.

An ant of negligible size walks a distance of 10 units in the x-y plane along the x-axis. It then turns left and goes up 5 units from its current point. If the ant continues turning left and going half the distance it had previously walked, repeating the pattern, find the co-ordinates of the point where the ant will eventually end up. Answer: ( 8, 4 )