where: Consider the equilibrium equation in the goods market: Y is the real domestic output, T is the tax revenue, Y coc(YT) ++, I is the exogenous investment spending, G is the exogenous government spending, Co is the consumption spending independent from Y, and C is the Marginal Propensity to Consume (MPC), with 0 < c < 1. The on-going war between Russia and Ukraine has created economic uncertainty around the globe, shifting the consumption spending. Assume that: (i) the Australian households now choose to save more, i.e., increase in the marginal propensity to save (MPS) during this uncertain period, ceteris paribus. (ii) Australian government is running a balanced budget, i.e. G = T. Explain and illustrate graphically the effect of the increase in the MPS on: (a) (b) (c) The total demand line (ZZ). Show clearly the effect on the intercept with the vertical axis and the slope. The autonomous spending. The multiplier.