The train is traveling 0.6 km/min along a straight track, moving in the direction shown in the figure below. The movie camera is 0.5 km away from the track, focused on the train.
(a) How fast is the distance from the camera to the train changing when the train is 936 km from the camera? Round your answer to two decimal places.
(b) How fast is the camera rotating at the moment when the train is 581 km from the camera? Round your answer to two decimal places: 581 radians per minute.