Two airplanes taxi as they approach the terminal. Plane 1 taxies with a speed of 11.6 m/s due north. Plane 2 taxies with a speed of 8.6 m/s in a direction 20.5° north of west.
(a) What are the direction and magnitude of the velocity of plane 1 relative to plane 2?
(b) What are the direction and magnitude of the velocity of plane 2 relative to plane 1?