(a) One airline has six across seating in coach (three seats on either side of the aisle). If seats are assigned randomly, what is the probability that a person will be stuck in a middle seat? (Enter the probability as a fraction.) (b) Another airline has five across seating. (There are three seats on one side of the aisle and two seats on the other side of the aisle.) If seats are assigned randomly, what is the probability that a person will have a window or an aisle seat? (Enter the probability as a fraction.)