Fragmnt and Word-e are two social media apps in which users can post messages in text. The character counts for posts on Fragmnt have a population mean of 96 and a standard deviation of 15. The character counts for posts on Word-e have a population mean of 355 and a standard deviation of 39. For each app, the distribution of the character counts is clearly bell-shaped. Charlie's last post on Fragmnt was 145 characters. Ali's last post on Word-e was 251 characters. (a) Find the z-scores of Charlie's last post as a post on Fragmnt and Ali's last post as a post on Word-e. Round your answers to two decimal places. X 5 z-score of Charlie's post: [ z-score of Ali's post: (b) Relative to its population, which post was longer? Choose the best answer based on the z-scores of the two posts. O Charlie's post X O Ali's post O It is unclear which post was longer relative to its population