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A certain flight arrives on time 86 percent of the time

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A certain flight arrives on time 86 percent of the time. Suppose 113 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that
?(a) exactly 104 flights are on time.
?(b) at least 104 flights are on time.
?(c) fewer than 102 flights are on time.
?(d) between 102 and 103, inclusive are on time.