Label  each of the following statements true, false, or uncertain. Explain briefly.

a. Income and financial wealth are both examples of stock variables.

b. The term investment, as used by economists, refers to the purchase of bonds and shares of stock.

c. The demand for money does not depend on the interest rate because only bonds earn interest.

d. A large proportion of US currency appears to be held outside the United States.

e. The central bank can increase the supply of money by selling bonds.

f. The Federal Reserve can determine the money supply, but it cannot change interest rates.

g. Bond prices and interest rates always move in opposite directions.

h. An increase in income (GDP) will always be accompanied by an increase in interest rates when the money supply is not increased.

i. Once the interest rate is zero, the Fed has no further policy options.