Suppose that the daily demand for gasoline (at a gas station in a small town) follows a normal distribution with mean = 4000 gallons and standard deviation = 500 gallons. What is the probability that during any day, the demand will be (a). Between 3000 and 5000 gallons? (6 points) (b). More than 5000 gallons? (7 points) (c). Less than 4000 gallons ? (7 points) d). What is the third quartile for the daily demand? (5 points)