[POI -GEN] The average number of domain runs to get 1 godly artifact in Genshin Impact is 5 (assuming Mihoyo is generous). Each run costs 20 resins. A. Determine the probability that a player will spend 100 resins to get 1 godly artifact. (3 points) B. Determine the probability that a player will speed 160 resins to get 2 godly artifacts. (3 points) C. Let X be the amount of resins used by the player to get one full set (5 artifacts). Find the mean and standard deviation of the probability distribution with the given random variable. (4 points)