Concept:Track the woman's position using directions and turns from the starting point.Explanation:Take the starting point as (0,0).She walks 3 km North, so position becomes (0,3).She turns West and walks 4 km, so position becomes (−4,3).She turns South and walks 7 km, so position becomes (−4,−4).Now she is facing South.Turning left from South means she faces East.She walks 4 km East, so final position becomes (−4+4,−4)=(0,−4).The point (0,−4) lies 4 km South of the starting position.
