7. In the above figure, suppose the demand for dollars permanently decreases to D2. To maintain the target, the Fed(A) can buy dollars.(B) can sell dollars.(C) must decrease the nation's net exports.(D) cannot permanently maintain the exchange rate target of 150 yen per dollar.

13. Ricardo buys cola and popcorn. Cola sells for $0.50 a can and popcorn sells for $1 per bag. He is in consumer equilibrium. The price of a cola jumps to $1 per can. In his new consumer equilibrium, Ricardo's(A) marginal utility of cola will be equal to his marginal utility of popcorn.(B) marginal utility per dollar spent will be 2.(C) total utility will be higher.(D) marginal utility of cola will decrease.

7. In the above figure, suppose the demand for dollars permanently decreases to D₂. To maintain the target, the Fed
(A) can buy dollars.
(B) can sell dollars.
(C) must decrease the nation's net exports.
(D) cannot permanently maintain the exchange rate target of 150 yen per dollar.

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