An airline charges the following baggage fees:. $25 for the first bag and an extra $35 for the second. Suppose 54% of passengers have no checked luggage, 34% have only one piece of checked luggage and 12% have two pieces. We suppose a negligible portion of people check more than two bags. A) ) Build a probability model, compute the average revenue per passenger, and compute the corresponding standard deviation. B) About how much revenue should the airline expect for a flight of 120 passengers? With what standard deviation?C) The standard deviation of baggage-related revenue is$.