An economy has a fixed price level, no imports, and no income taxes. An increase in autonomous expenditure of $3 trillion increases equilibrium expenditure by $15 trillion. Calculate the multiplier and the marginal propensity to consume. > >> Answer to 2 decimal places. The multiplier is The marginal propensity to consume is If an income tax is introduced in this economy, the multiplier O A. decreases O B. increases or decreases but we don't know for sure O C. increases O D. does not change