In the land of Ruritania there are two tribes growing wheat and corn. Tribe A has 100 workers and Tribe B has 200 workers. Assume that both tribes have linear production possibility frontiers. The workers in Tribe A can grow 1,000 tons of wheat or 600 tons of corn annually. The workers in Tribe B can grow 800 tons of wheat or 400 tons of corn annually. a. Plot the production possibility frontier (PPF) of each tribe in separate graphs, with wheat on the horizontal axis and corn on the vertical axis (restrict your attention to the first quadrant: that is, consider only values equal to or greater than zero for wheat and corn). Write each tribe's PPF as an equation.