Replacement times for Maytag washer and dryer sets are normally distributed with a mean of 4.8 years and a standard deviation of 1 years

round all final answers to 3 decimals

a) find the replacement time ( in years) that separates the top 16% from the bottom 84%

b) if the manufacturer wants to provide a warranty time so that only 1 % 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 ?