Doomsday Airlines has an old propeller plane with two engines, referred to as the "port" engine and the "starboard" engine. The plane will fly with either one or both of its engines working, but not if both engines fail (obviously!). Suppose P(port engine fails) = 0.10, P(starboard engine fails) = 0.13 and P(either or both engines fail) = 0.2175. What is the probability that on its next flight the plane will: (a) have no engines fail; (b) safely complete the journey; (c) have only one engine fail?