Draw one correctly labeled graph of the short-run and long-run Phillips curves, labeling the current equilibrium point A. Assume that the government increases spending by $20 billion to stimulate economic activity. Assume that the marginal propensity to save is 0.25. Calculate the maximum total change in real GDP that could occur following the $20 billion increase in government spending. On your graph in part (a), label the new equilibrium point B as a result of the increase in government spending. Had the government lowered personal income taxes by $20 billion instead of increasing spending by $20 billion, would the maximum total change in real GDP be greater than, smaller than, or the same as the one calculated in part (b) ? Explain.