A technical assistance service with electronic equipment has that its service time is normally distributed with a mean of 80 minutes with a standard deviation of 25 minutes: a) What is the probability that the service time exceeds 2 hours? b) What is the probability that the service time is between 45 and 150 minutes? c) What is the probability that the service time lasts at most 1 hour? Response d) How much service time will be in the bottom 5 percent of the distribution?

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