A certain flight arrives on time 86 percent of the time. Suppose 189 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that (a) exactly 149 flights are on time. (b) at least 149 flights are on time. (c) fewer than 172 flights are on time. (d) between 172 and 176, inclusive are on time. . . .. . (a) P(149) = (Round to four decimal places as needed.)