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Each time a player plays a certain card game, there is a probability of 0.15 that the game will work out successfully and there is a probability of 0.85 that the game will not work out successfully. The probability of success in any game is independent of the outcome of any other game. A player plays the games until a game works out successfully. 1. (3 points) Find the probability that she plays 4 games altogether. 2. (3 points) Find the probability that at most 6 games are played. 3. (2 points) Write down the expected number of games that are played