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1. Replacement times for washing machines are normally distributed with a mean of 9.3 years and standard deviation of 1.1 years. Find the probability that 70 selected washing machines will have a mean replacement time less than 9.1 years. 2. Annual precipitation in a certain city is normally distributed with a mean of 99 inches, and a standard deviation of 18 in. Find the probability that the mean annual precipitation during 35 randomly picked years will be less than 101.8 in