Webflix keeps data on customer preferences using a bipartite network connecting users to movies they have watched and/or rated. Webflix's movie library contains approximately 1,000 movies. In the fourth quarter of 2022, Webflix reported having about 5,000 users. Also, on average, a user has watched and/or rated 750 movies. Approximately how many links are in this network? Would you consider this network sparse or dense? Explain.