A plane flies with 890 km/h relative to the surrounding air. a) Assuming it is headed east, and there is a wind blowing south at 90 km/h, what is the plane's velocity relative to the ground? Give your answer in terms of components, and also in terms of speed and angle with respect to the eastward direction. b) How far does the plane travel in 2.5 hours? How far south does it travel during this time? c) If we want the plane to actually fly east, despite the wind, in which direction should it be headed?