Average expiration duration of a dairy product is 22.6 hours with a standard deviation of 2.6 hours. If expiration durations are approximately normally distributed, determine: a)The probability that expiration duration is between 20.5 hours and 22.5 hours b) The duration that separates the top 30% of the duration from the bottom of the 70% of the duration. Round answer to one decimal place. c) If 36 samples of the product are randomly selected, what is the probability that the mean of their expiration duration is greater than 22.3 hours?