Briefly explain whether each of the following statements is true or false.

1. The 'paradox of thrift' is the argument that an increase in desired saving shifts the LM curve to the left as individuals increase their demand for money, thus lowering real GDP.

2. The endogenous growth predicted by the AK model is due to the assumption of a constant marginal product of capital.

3. In the AD-AS model, monetary policy cannot stabilize both the price level and the level of real GDP following a shock to aggregate supply.

4. The shoe-leather cost of inflation is minimized by targeting a zero rate of inflation.

Please solve all 4 and give explanations in 1 or 2 lines

Thanks.