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Amy and Jane are gambling together, A fair coin is tossed repeatedly

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Amy and Jane are gambling together, A fair coin is tossed repeatedly. Each time a head comes up, Amy wins two euro from Jane, and each time a tail comes up, Amy loses two euro to Jane. Use R to simulate this game 100 times, and estimate:

(a) the number of times that Amy is ahead in these 100 tosses;

(b) how much Amy has won or lost after 100 tosses.