Based upon FAA determines the average age of the fleets of the 10 largest U.S. commercial passenger carriers is 13.4 years with the standard deviation of 1.7 years. Assume that 40 airplanes were randomly selected from the fleets of these 10 carriers and were inspected for cracks in these airplanes which are considered too large for flying. Determine the probability that the average age of these 40 airplanes is at least 14 years old? Round your answer to 4 decimal places. Remember to round your z-value to two decimal places.