Your friend working at UCLA dining hall has been given the task of determining how students feel about this year's menus. Your friend wants to complete the task by scraping Reddit for key words related to UCLA food and then run them through a model that can do sentiment analysis. The given model can determine if the text contains positive, negative, or neutral sentiments. Does your friend's data collection method exhibit any selection bias? Explain each kind of bias you give in the context of this situation. (Refer to Week 1 Lecture 2, slide 39 for a list)