Suppose that the average price of a fixed basket of goods and services is $50 in the U.S. and 150 pesos in Mexico. The theory of PPP predicts that the exchange rate in the long run is _Mexican pesos per one U.S dollar. If the exchange rate is one Mexican peso per one U.S. dollar, in the long run, the U.S. dollar will against the Mexican peso so that PPP holds. Select one; O 3, depreciate 1/3, depreciate 1/3, appreciate O. 3, appreciate