Suppose C = 100 + 0.7 Y, G = 50, I = 120
In a closed economy Y = C + I + G
(a) What is the equilibrium level of Y ?
(b) What happens if the level of consumption becomes C = 130 + 0.7 Y?
(c) What happens if the level of consumption becomes C = 120 + 0.85 Y? Illustrate your answers using the Keynesian cross diagram.