A novice golfer on the green takes three

strokes to sink the ball. The successive dis-
placements are 5.9 m to the north, 10 m 45 �
north of east, and 5.9 m 26� west of south.
Starting at the same initial point, an expert
(lucky) golfer could make the hole in a single
displacement.
What is the magnitude of this single dis-
placement?