An airplane starting from airport a flies 399 km east, then 552 km at 58.5 ◦ west 3 of north, and then 890 km north to arrive finally at airport b. the next day, another plane flies directly from a to b in a straight line. in what direction should the pilot travel in this direct flight? use counterclockwise as the positive angular direction from due east, between the limits of −180◦ and 180◦ . assume there is no wind during these flights. answer in units of ◦ .