Assume that a hypothetical economy with an MPC of 0.8 is experiencing severe recession. Instructions: In part a, round your answers to 2 decimal places. Enter your answers as positive numbers. In part b, enter your answers as whole numbers. a. By how much would government spending have to rise to shift the aggregate demand curve rightward by $50 billion? How large a tax cut would be needed to achieve the same increase in aggregate demand? b. Determine one possible combination of government spending increases and tax increases that would accomplish the same goal without changing the amount of outstanding debt (i. e., maintaining the budget balance at its current value).