A horse canters away from its trainer in a straight line, moving 150 m away in 16.0 sec. It then turns abruptly and gallops halfway back in 5.2 sec.

horse canters away from its trainer in a straight line, moving 150 m away in 16.0 sec. It then turns abruptly and gallops halfway back in 5.2 sec. Calculate (a) its average speed and (b) its average velocity for the entire trip, using “away from the trainer” as the positive direction. Show your work.