A hiker travels 3 km east, 4 km north, and then 12 km west. Which option gives the total distance travelled and the magnitude of the displacement from the starting point?
a) Distance =19km, Displacement ≈13km
b) Distance =9.9km, Displacement =19km
c) Distance =19km, Displacement ≈9.9km
d) Distance =19km, Displacement ≈5km