The mean incubation time of fertilized eggs is 20 days. Suppose the incubation times are approximately normally distributed with a standard deviation of 1 day. (a) Determine the 15th percentile for incubation times. (b) Determine incubation times that make up the middle 97% of fertilized eggs. (a) The percentile for ination time is 19 days. (Round to the nearest whole number as needed.)

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