lifetime is 16 years with a standard deviation of 2 years. (a) If you bought one such car today, what is the chance that your car will only last for up to 14 years? (b) If your friend had a car of this brand for 14 years already, what is the chance that he (she) has to buy a new car in seven years? (c) If a company bought 7 such cars, what is the probability that exactly two of them will last between 12 and 20 years? (d) If the manufacturer want to offer a warrantee that is as attractive as possible and at the same time they don't want to refund more than 0.5% of customers, how long the warranty should be?