a) Give a brief outline of the Keynesian theory of output and employment and discuss the main criticism leveled against this theory. (10 marks) (6 Marks) b) Discuss any three factors that determine the natural rate of unemployment. c) Suppose the following functions are given:- Commodity Market Consumption function: C = 10 +0.5Y Investment function: 1 = 200- 20001 Money market Transaction demand for money: MDT = 0.5Y Speculative demand for money: Mps = 150 - 1500 Money supply: MS = 150 Required: i. 11. Determine equilibrium levels of income and interest rate for the economy. Using a well labelled diagram, illustrate equilibrium conditions in part (i) (6marks) (4marks) iii. If money supply increases by 50, what would be the effect on the equilibrium level of income and rate of interest? (4marks)