The increased number of small commuter planes in major airports has heightened concern over air safety. An eastern airport has recorded a monthly average of 5 near-misses on landings and takeoffs in the past 5 years. a. Construct the probability distribution of near-misses landings in the airport. (Note: probabilities should be rounded-off to the nearest ten-thousandths.) b. What is the probability that during a given month there are at most 2 near-misses.