Company XYZ know that replacement times for the portable MP3 players it produces are normally distributed with a mean of 3.2 years and a standard deviation of 0.9 years. a) Find the probability that a randomly selected portable MP3 player will have a replacement time less than 0.32 years? b) If the company wants to provide a warranty so that only 2% of the portable MP3 players will be replaced before the warranty expires, what is the time length of the warranty? warranty =  years

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