Use the production function of the hypothetical economy represented in the graph to answer the questions. a graph showing output, investment, and depreciation with capital on the horizontal axis and output on the vertical axis. both output and investment are concave down curves, and output is always greater than investment. depreciation is a straight line. all three curves pass through the point (0, 0). depreciation intersects investment at the point (400, 200). output passes through the following points: (100, 225), (400, 500), and (500, 575). what is the steady-state level of output?