I dont know how to answer the questions

QUESTION 2 Given the diagram below for a two sector economy. Injections/leakages S 100 500 1,000 National Income -100 a) Calculate the value of marginal propensity to consume (MPC) and marginal propensity to save (MPS). (2 marks) b) State the consumption and savings function. (2 marks) C) Calculate the value of average propensity to consume (APC) and average propensity to save (APS) at an income of RM500. (2 marks) d) Calculate the value of consumption and savings at income of RM1,000. (2 marks) e) Calculate investment multiplier for the above economy. (2 marks)