1. Assume in a simple economy that the level of saving is -500 when aggregate output equals zero and that the marginal propensity to save is 0.2. Derive the saving function and the consumption function, and draw a graph showing these functions. At what level of aggregate output does the consumption curve cross the 45 line? Explain your answer and show this on the graph.

2. Use your answer to the previous problem to calculate the MPC, MPS, government spending multiplier, and tax multiplier. Draw a graph showing the data for consumption spending, planned aggregate expenditures, and aggregate output. Be sure to identify the equilibrium point on your graph.