True/False/Uncertain - Briefly explain. No credit without an explanation.

1)Countries hit by a negative symmetric shocks outside a monetary union do not face adjustment prob- lems.

2)Theoretically, monetary unions should lead to more asymmetric shocks.

3)Pricing to market would lead to more price convergence in a monetary union.

4)More trade integration even with less symmetry can make a monetary union optimal.

5)With expected devaluation, an intermediate shock would not result in devaluation.