2. Population growth: Suppose the world population today is 7 billion, and suppose this population grows at a constant rate of 3% per year from now on. ( This rate is almost certainly much faster than the future population growth rate; the high rate used here Is useful for pedagogy. If you like, you can use a spreadsheet program to help you with this question.) (a) What would the population equal 100 years from now? (b) Compute the level of the population fort = 0, fi l, t - 2. r= 10, 1 - 25, and r - 50. (c) Make a graph of population versus time (on a standard scale). (d) Now make the same graph on a ratio scale