Please show work!

Please complete only TWO of the following three Open Response questions. Each of the two will be worth 20 points. If more than two questions are answered, only the first two will be graded. Don't forget to upload a file showing ALL of your work for credit. An Ohio train is traveling at a constant 72.4 km/h when the conductor is told that there is an obstruction further down the track and hits the brakes. A) How long does it take the train to come to a complete stop if it accelerates at a rate of -1.105 m/s2? (10 points) B) If the obstruction is 190 meters away when the conductor begins to brake, will the train stop in time to avoid the obstruction and derailment, or not? (10 points)