Parnelli" Gales is cruising down the street at a constant speed of 26.7 m/s (60 mph) when the traffic light in front of him turns red. Aa. If Parnelli's reaction time is 250 ms (0.25 s), how far does he and his car travel before beginning to slow down? b. If his average rate of acceleration is -4.5 m/s2, how long does it take him to come to a stop (excluding his reaction time)