Tests reveal that a normal driver takes about 0.75 s before he or she can react to a situation to avoid a collision. It takes about 3 s for a driver having 0.1% alcohol in his system to do the same. If the driver with 0.1% alcohol is travelling on a straight road at 72 km/h (20 m/s) and his car can decelerate at 1 m/s², determine the shortest stopping distance (d) from the moment he see the pedestrians.