If the marginal propensity to save is 0.4 (or 40%) and the government plans to spend $4,000 in the economy, then what will be the change in national income as a whole? (1 point) The national income will increase by $10,000. The national income will increase by $25,000. The national income will decrease by $10,000. The national income will decrease by $25,000. The national income will remain constant