(i) Explain any two precautions to be adopted while estimating National Income by Expenditure method. (ii) "Higher Gross Domestic Product (GDP) always means higher per capita availability of goods in the economy." Defend or refute the given statement as the index of welfare of the people of that country. (i) Distinguish between Stock and flow variables, using suitable examples. (ii) Explain the components of 'Profit' as per Income Method of estimating National Income (NNP_FC).