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Based on an analysis of sample data, an article proposed the pdf f(x) = 0.15e−0.15(x −...

Based on an analysis of sample data, an article proposed the pdf f(x) = 0.15e−0.15(x − 1) when x ≥ 1 as a model for the distribution of X = time (sec) spent at the median line. (Round your answers to three decimal places.) (a) What is the probability that waiting time is at most 7 sec? More than 7 sec? at most 7 sec P(X ≤ 7) = more than 7 sec P(X > 7) = (b) What is the probability that waiting time is between 5 and 8 sec?

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