A motorist is traveling at 18 m/s when he sees a deer in the road 38 m ahead. (a) If the maximum negative acceleration of the vehicle is -4.5 m⁄s^2 , what is the maximum reaction time ?t of the motorist that will allow him to avoid hitting the deer? (b) If his reaction time is actually 0.300s, how fast will he be traveling when he hits the deer?