Problem 5: Textbook Problem 7.73 An ethanol railroad tariff is a fee charge for shipments of ethanol on public railroads. The Agriculture Marketing Service publishes tariff rates for railroad-car shipments of ethanol in the Biofuel Transportation Database. Assuming that the standard deviation of such tariff rates is $1150, determine the probability that the mean tariff rate of 500 randomly selected railroadcar shipments of ethanol will be within $100 of the mean tariff rate of all railroad-car shipments of ethanol. 10 points