$1)$ What are the differences between categories and social groups? Please give one example to support your answer. $(3$ Marks$)2)$ What are the several important differences between primary and secondary groups? Please $4)$ Explain explain the effect of social media such as Facebook on the size and character of social networks. How do social media bring more and more people together? In what ways can social media discourage social interaction? $(3$ Marks$)$