[-/1 Points] DETAILS - LAROSESTAT3 6.5.034. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The website Statistica.com reported in 2014 that the mean number of Facebook friends for 18- to 24-year-olds is 649. Assume the distribution is normal with M = 649 friends and standard deviation o = 170 friends. (a) Find the probability that a randomly selected Facebook user has fewer than 224 friends. (Round your answer to four decimal places.) (b) Find the probability that a randomly selected Facebook user has more than 819 friends. (Round your answer to four decimal places.) (c) Find the probability that a randomly selected Facebook user has between 224 and 819 friends. (Round your answer to four decimal places.) (d) Find the number of Facebook friends that represents the 80th percentile. (Round your answer to the nearest whole number.) Facebook friends (e) One particular Facebook user has 1329 friends. Find the Z-value corresponding to having 1329 friends. Z = Is this unusual? On what do you base your answer? O No, it is not unusual, because the Z-value is less than 3. Yes, it is unusual, because the Z-value is greater than or equal to 3. Yes, it is unusual, because the Z-value is less than 3. O No, it is not unusual, because the Z-value is greater than or equal to 3. You may need to use the appropriate table in the Appendix of Tables to answer this question. NOV tv