An airplane in a holding pattern flies at constant altitude along a circular path of radius 3.54 km. If the airplane rounds half the circle in 154 s, determine the following. HINT Apply the definitions of average speed and average velocity. Click the hint button again to remove this hint. (a) Determine the magnitude of the airplane's displacement during the given time (in m). m (b) Determine the magnitude of the airplane's average velocity during the given time (in m/s). m/s (c) What is the airplane's average speed during the same time interval (in m/s)? m/s