Suppose that the speed at which cars go on the freeway is normally distributed with mean 69 mph and standard deviation 7 miles per hour. Let X be the speed for a randomly selected car.

a. What is the distribution of X? X ~ N(,)

b. If one car is randomly chosen, find the probability that it is traveling more than 66 mph. Round to 4 decumal places.

c. If one of the cars is randomly chosen, find the probability that it is traveling between 72 and 77 mph. Round to 4 decimal places.