Consider an economy described by the following equations: Y = C + I + G C = 100 + 0.8 (Y - T); I = 300 – 30r; G = 125; T = 100 Where Y is GDP, C is consumption, I is investment, G is government purchases, T is taxes, and r is the interest rate. If the economy were at the full employment (that is, at its natural rate), GDP would be 2,200. What is the marginal propensity to consume? What is the marginal propensity to save? a. 0.8; 0.2 b. 0.75; 0.25 c. None of the other answers is correct. d. 0.75; 0.5

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