Please identify each of the following the statements as true/false/uncertain and support your claim in one or two short sentences .

Please explain in short sentences! ! !

1. All else equal, a temporary positive supply shock will shift the AD curve up to the left.

2. Consumption is a positive function of disposable income. This suggests that there should be a one-for-one increase in consumption when the government have a onetime tax cut.

3. The real interest rate parity relation implies that real interest rates must be the same across countries.

4. According to relative purchasing power parity, the rate of appreciation of the nominal exchange rate equals the foreign inflation rate minus the domestic inflation rate.