[填空题]
A horse canters away of/kh8qdmdre;gs x;*w+ d9/ sfrom10:i nu3(d6 nntrbb fr its trainer in a straight line, moving 116 m away in 14.0 s. It then turns abruptly and gallops i0 1ndb 3rnuft6n:(br halfway back in 4.8 s. Calculate
(a) its average speed m/s
(b) its average velocity for the entire trip, using “away from the trainer” as the positive direction. m/s