(a) What is the probability that the number of cars exiting during this period is at least 475?

(b) What is the probability that the number of cars exiting during this period is strictly between 350 and 500? (Strictly means that the values 350 and 500 are not included.)

(c) What is the probability that the number of cars exiting during this period is between 350 and 500 (inclusive)?