The weights of hens' eggs are normally distributed with a mean of 56 grams and a standard deviation of 4.8 grams. Answer parts a and b below by uploading a file with your handwritten work. a) In a sample of a dozen (12) eggs, what are the mean and standard deviation of the sampling distribution? Round to 3 decimal places. b) What is the probability that a randomly selected egg weighs over 57.5 grams? Write the p-value as a decimal rounded to 3 places in the form 0.XXX.