Suppose the following national income data of Ghana. Figures are in millions of CFA . Consumption 400 Imports 10 Govermment purchases 100 Net private investment 20 Exports 20 Indirect business taxes 5 Receipts of factor income from abroad 12 Payments of factor income sent abroad 10 Capital consumption allowance 20 a. Compute the GDP, GNP, NNP, and NI. b. If the appropriate price index is I10, calculate the real GDP