a. exactly 4 cars exiting during the next minute observed — Traffic Arlington Turnpike Exit 123 conforms roughly Poisson conditions average number per

Traffic exiting the Arlington Turnpike at Exit 123 conforms roughly to the Poisson conditions. The average number of cars exiting is 6 per minute. Compute the probability of

a. exactly 4 cars exiting during the next minute observed.

b. at least 10 cars exiting during the next minute observed.

c. no more than one car exiting during the next minute and a half.

d. exactly two cars exiting during the next thirty seconds observed.