Tests reveal that a normal driver takes about 0.75s before he or she can react to a situation to avoid a collision. It takes about 3s for a driver having 0.1% alcohol in his system to do same. If such drivers are traveling on a straight road at 30 mph (44 ft/s) and their cars can decelerate at 2ft/s2, determine the shortest stopping distance d for each from the mment they see the pedestrains.