Assume that a hypothetical economy with an MPC of 0.8 is experiencing severe recession. a. By how much would government spending have to rise to shift the aggregate demand curve rightward by $25 billion? How large a tax cut would be needed to achieve the same increase in aggregate demand? Instructions: Round your answer to 2 decimal places and enter your answer as a positive number. 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.