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The attention span of a two-year-old is exponentially distributed with a mean of about 7 minutes. Suppose we randomly survey 60 two-year-olds. + Part (a) - Part (b) Give the distribution of X. X - + Part (c) Part (d) Give the distribution of X. (Round your standard deviation to two decimal places.) X - Part (e) Before doing any calculations, which do you think will be higher? O the probability that an individual attention span is less than 9 minutes O the probability that the average attention span of the 60 children is less than 9 minutes Part (f) Calculate the probability that an individual attention span is less than 9 minutes. (Round your answer to four decimal places.) Calculate the probability that the average attention span of the 60 children is less than 9 minutes. (Round your answer to four decimal places.)