A hiker starts at her campsite and follows three legs in succession:
1. 1.20km at 40∘ north of east
2. 0.800km at 60∘ west of north
3. 0.500km due south
Which of the following gives the magnitude and direction of her resultant displacement from the campsite?
a) 0.71km at 19∘ north of east
b) 1.75km at 23∘ north of east
c) 0.71km at 71∘ north of east
d) 0.71km at 71∘ east of north