Consider a simple macro model with a constant price-level and demand- determined output. The equations of the model are: . C = 1650 + 0.70YD | = 1425 . G = 525 . T = 0.10Y . X = 1700 . IM = 0.20Y In equilibrium, total consumption is:Consider the following consumption function: C = 120 + 0.65YD. When YD = 1800, what is the marginal propensity to save? (Answer to two decimal points.)