4. (25 Points) Consult the IS Curve Class handout. Assume that the MPC stays at 75% throughout this section. In each case below draw an initial IS Curve and label 1your diagram. Then show which direction and by howr much horizontally the IS curve shifts from Its Initial position. a. [8 Points) Suppose the national government led lav President Uhcan Buildit increases government spending on public transportation by $200 billion partly funded lav a new tax on the oil reserves of major oil companies that raises $100 billion in revenue. These are one-time, permanent changes to the levels of spending and taxes