A man goes for a walk, starting from the origin of an xyzcoordinate system, with the xy plane horizontal and thex axis eastward. Carrying a bad penny, he walks 1000 meast, 1900 m north, and then drops the penny from a cliff 480 mhigh. (a) In unit-vector notation, what is the displacement of the penny from start to its landing point?(b) When the man returns to the origin, what is the magnitude of his displacement for the return trip?