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. b. (6 Points} Suppose the national government led by President E. T. Urspinach raises taxes by $300 billion per year and cuts spending by $150 billion per year. These are one-time, permanent changes to the levels of spending and taxes