John goes hunting for wild ducks every Saturday. He always loads his shotgun with three shells. From past experience it is known that, the probability to miss on the first shot is 0.9, the probability to miss on the second shot is 0.7 and the probability to miss on the third shot is 0.3. He goes hunting again this Saturday. Note: On each shot fired at a bird he can either miss or hit. Find the probability that: At the end of his shells he will bring home two ducks

The first shot is a "miss" and the second is a "miss"

At the end of his shells he will bring home at most one duck

Given that the first shot is a "hit" and the second is a "hit", what is the probability that the third shot is a "hit"?