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Replacement times for Maytag washer and dryer sets are normally distributed with a mean of 8.1 years and a standard deviation of 1.7 years. Round all final answers to 3 decimals. (a) Find the replacement time (in years) that separates the top 30 % from the bottom 70 % . (b) If the manufacturer wants to provide a warranty time so that only 3 % of the washer and dryer sets will be replaced before the warranty expires, what length of time (in years) would you recommend for the warranty? Check