Evaluate the validity of each of the following statements. Support your answer with relevant definitions/equations.

a. When there are no domestic taxes in an open economy, GNI is equal to GNDI.

b. When the government runs a budget deficit, the current account must also be in deficit.

c. In a closed economy, GNE is equal to GNI.

d. In an open economy, if there is no NFIA, then GNE is equal to GNI.

e. In an open economy with no taxes, government saving is equal to private saving.

f. In a closed economy, domestic saving is equal to domestic investment.

g. In an open economy, if the economy has a current account surplus, this implies that domestic saving exceeds domestic investment.