A delivery man starts at the post office, drives 40 km north, then 20 km west, then 60 km northeast, and finally 50 km north to stop for lunch. Find his net displacement vector. R vector −(22.43 i+232.43 j)mi R vector - (52.45 i +102.55 j)mi R vector - ( 22.43 i+132.43 j)mi R vector - (56.53 i +923.25 j) mi