Suppose an airplane flies at a constant altitude of 5km, with a velocity of 42km/h. At Time t=0 the airplane passes directly above the radar station, where t is measured in hours.

(a) how fast Is the distance between the airplane and the radar station changing after 10 minutes? round to 2 decimals and provide units.

(b) how fast is the distance between the airplane and the radar station changing at time t=0, I/e. when the airplane is directly above the radar station? is this reasonable? explain