3. A man is driving north at a rate of 17 m/sec. He sees a railroad track 20 m ahead of him that is perpendicular to the road. There is a train going east on the track crossing the road and the man determines with a radar gun that the engine is 35 m from him and the distance between his car and the engine is increasing at the rate of 5 m/s. What is the speed of the train? a. 17.930 m/sec b. 28.722 m/s c. -17.930 m/sec d. -28.722 m/sec e. 289.914 m/sec