A certain flight arrives on time 80 percent of the time. Suppose 132 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that
(a) exactly 97 flights are on time.
(b) at least 97 flights are on time.
(c) fewer than 118 flights are on time.
(d) between 118 and 120 , inclusive are on time.
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