The US Census Bureau records the population for the 50 states each year. The accompanying data file contains these dat- for the years 2010 to 2018. a. Create two subsets of the state population data: one with 2018 population greater than or equal to 5 million and one with 2013 population less than 5 million. How many observations are in each subset? b. In the subset of states with 5 million or more people, remove the states with over 10 million people. How many states were removed?