Need answers with proccedure

Problem 1 6.0 points possible (ungraded, results hidden) Daniil Dubov has a 50% chance of winning a professional chess tournament. a. In a year if there are 7 professional tournaments, what is the probability that only the last tournament will be won by Daniil Dubov? Answer in exact fraction, or rounded to at least 4 decimal places. b. Among 11 tournaments, what is the probability that Danil'l Dubov will win exactly 10 tournaments? Answer in exact fraction, or rounded to at least 4 decimal places. c. If he has 10 tournaments scheduled for the next year. what is the probability that he will win at most "a" tournamentts]? Answer in exact fraction, or rounded to at least 4 decimal places