How well do pouches of mackerel satisfy the six properties of ideal money (durable, portable, divisible, uniform quality, low opportunity cost, stable value)? 2- In countries where the monetary system has broken down, what are some alternatives to which people have resorted to carry out exchange? 3- Why would China want its own currency to be undervalued relative to the U.S. dollar? How does China maintain an undervalued currency? 4.The Big Mac index computed by the economist magazine has consistently found the U.S. dollar to be undervalued against some curriencies and overvalued against others. This finding seems to call for a rejection of purchasing power parity theory. explain why this index may not be valid test of theory