Assume, for a hypothetical economy, the following data is given : (i) Calculate the missing values in the given schedule. (ii) Define the term 'Effective Demand'. (iii) On the basis of the given data, it can be said that the equilibrium level of income is 200. Do you agree ? If not, explain the adjustment mechanism that may take place to attain equilibrium level of income. Suppose, in an economy, every Rs. 1 increase in investment expenditure leads to an increase of Rs. 4 in the National Income. Calculate the following : (i) Value of Investment Multiplier (K). (ii) Change in consumption expenditure, if the income changes from Rs. 400 to Rs. 500. (iii) "Sum of Marginal Propensity to Consume (MPC) and Marginal Propensity to Save (MPS) is always equal to one." Justify the given statement with the help of a suitable argument.