Average fuel consumption for a Boeing 747 commercial jet in cruising position is 3213 gallons of jet fuel per hour (based on information from Canadian Pacific Air). Assume that the fuel consumption distribution is mound-shaped and approximately normal with a standard deviation of 180 gallons of jet fuel per hour. When a 747 is in cruising position, what is the probability the fuel consumption is
(a)Between 3000 and 3500 gallons per hour?
(b) less than 3000 gallons per hour
(c) more than 3500 gallons per hour