In a closed economy, the national savings function for Malaysia is S = -100 + 0.3Y. Based on the information, answer the following questions. National Income Savings (S) Consumption (C) MPC MPS (Y) RM (Million) RM (Million) RM (Million) 0 250 500 750 1000 1250 1500 1750 2000 a. Calculate total savings and total consumption. (9 marks) b. Find the value of the marginal propensity to consume (MPC) and marginal propensity to save (MPS). (6 marks) c. Derive the consumption function based on the above information. (2 marks) d. Differentiate between autonomous investment and induced investment