Aman walks across 3 main streets every morning on his way to work, and crosses the same 3 streets going home. each time he crosses the street, he is subject to being hit by a car, with probability 510−8 . we treat each crossing as independent with the same risk. a)assume he walks to work 200 days per year, for 20 years. what is the probability that he is hit by a car at least once? b)what about if there are 100 on the same walking schedule in a town. what is the probability that at least one is hit over that time frame.