Suppose that the average number of Facebook friends users have is normally distributed with a mean of 137 and a standard deviation of about 60. Assume sixteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What i'sk'the distribution of 5? :T: - N( H J) b. For the group of 16, find the probability that the average number of friends is less than 118. I, c. Find the first quartile for the average number of Facebook friends. f l d. For part b), is the assumption that the distribution is normal necessary? No Yes Hint