Assume that a hypothetical economy with an MPC of 0.9 is experiencing severe recession

Assume that a hypothetical economy with an MPC of 0.9 is experiencing severe recession.
Instructions: In part a, round your answers to 2 decimal places and write them as positive numbers. In part b, write your answers as whole numbers.

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?
b. Determine one possible combination of government spending increase and tax increase that would accomplish the same goal without changing the amount of outstanding debt.

Increase spending by $_billion.

Increase taxes by $_billion.