Suppose the time spent by a randomly selected student who uses a terminal connected to a local time-sharing computer facility has a gamma distribution with mean 20 min and variance 80 min?. (a) What are the values of a and 8? a = B = (b) What is the probability that a student uses the terminal for at most 28 min? (Round your answer to three decimal places.) (c) What is the probability that student spends between 20 and 36 min using the terminal? (Round your answer to three decimal places.)

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