Suppose firms become very optimistic about future business conditions and invest heavily in new capital equipment.a. Draw an aggregate demand and aggregate supply diagram to show the short-run effect of this optimism on the economy.b. Use the diagram from part (a) to show the new long-run equilibrium of the economy. (For now, assume there is no change in the long-run aggregate supply curve.)c. Explain why the aggregate quantity of output demanded changes between the short run and the long run.d. How might the investment boom affect the long-run aggregate supply curve? Explain.