10. Is a paid post more or less effective than an organic post in increasing user engagement? (5 points) Does timing (i.e., day of week, month) of the status update matter for user engagement? Please use regression results to justify your answers. (10 points) The data does not indicate explicitly which variables incorporate calls-to-action. That said, which variables could you use to crudely proxy for calls-to-action? Please explain. (10 points) What are your recommendations for future social media posting on Facebook? Please explain as specifically as possible how you come up with these recommendations? (10 points) Do you believe that your recommendations for Sephora' Facebook postings also apply for its postings on Instagram? Please explain. (10 points) Please list at least three potential caveats or concerns that might contaminate the effectiveness of your recommendations. How would you investigate and address these concerns in the next step