A truck travels due east for a distance of 1.5 km, turns around and goes due west for 7.8 km, and finally turns around again an: travels 3.5 km due east. (a) What is the total distance, in kilometers, that the truck travels? - km (b) What are the magnitude (in km) and direction of the truck's displacement? magnitude X Displacement is the change in position, that is, the difference between the initial and nal position. km direction - f