Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and standard deviation 7

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Suppose that the speed at which cars go on the freeway is
normally distributed with mean 75 mph and standard deviation 7
miles per hour. Let X be the speed for a randomly selected car.
Round all answers to 4 decimal places where possible. a. What is
the distribution of X? X ~ N( 75 , 7 ) b. If one car is randomly
chosen, find the probability that it is traveling more than 72 mph.
c. If one of the cars is randomly chosen, find the probability that
it is traveling between 76 and 79 mph. d. 88% of all cars travel at
least how fast on the freeway? mph.