1. Answer the next question(s) on the basis of the following national income data for the economy. All figures are in billions. Personal consumption expenditures $400 Government purchases 128 Gross private domestic investment 88 Net exports 7 Net foreign factor income earned in the U.S. 0 Consumption of fixed capital 43 Indirect business taxes 50 Compensation of employees 369 Rents 12 Interest 15 Proprietors' income 52 Corporate income taxes 36 Dividends 24 Undistributed corporate profits 22 a. Calculate the gross domestic product for the above economy. b. Calculate the Net domestic product