A radar station locates a sinking ship at range 17. 3 km and bearing 136° clockwise from north. From the same station, a rescue plane is at horizontal range 19. 6 km, 153° clockwise from north, with elevation 2. 20 km.
a) Write the position vector for the ship relative to the plane, letting represent east, north, and up.
b) How far apart are the plane and ship?