Suppose that the number of Facebook friends users have is normally distributed with a mean of 128 and a standard deviation of about 57. Assume forty-five individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of T? I ~ N( b. For the group of 45, find the probability that the average number of friends is less than 139. c. Find the first quartile for the average number of Facebook friends. Round to 2 decimal places. d. For part b), is the assumption that the distribution is normal necessary? O YesO No Question Help: B Written Example Message instructor Submit