3. Average expiration duration of a dairy product is 25.3 hours with a standard deviation of 3.5 hours. If expiration durations are approximately normally distributed, determine: a) The probability that expiration duration is between 22.6 hours and 24.3 hours [3 marks] b) The duration that separates the top 25% of the duration from the bottom of the 75% of the duration. Round answer to one decimal place. [3 marks] c) If 36 samples of the product are randomly selected, what is the probability that the mean of their expiration duration is greater than 26.1 hours?