1. Identify the independent , dependent variables and variable here in this study from the article "Study: Social media use linked to decline in mental a. a. Introduction to Facebook on college campuses

b. Drugs and alcohol use by individuals

c. Levels of anxiety and depression

d. What year the student was at college

e. What month Facebook was introduced on campus

2. Identify the population, sample frame, sample and sampling method for this study described in "Study: Social media use linked to decline in mental health" (this may require some investigation on your part, it may not be explicitly stated in this article).