Youth Unemployment in Western Balkan Countries (Kosovo, Albania, Macedonia, Montenegro, Serbia, Bosnia and Herzegovina) and how is Unemployment affecting these Countries joining in EU

1. Is unemployment one of the reasons why Western Balkan Countries (Albania, Kosovo, Serbia, Montenegro, Macedonia, and Bosnia and Herzegovina) still did not join EU?
2. Which country is closest to joining the EU?
3. How did the external economic relations and EU might affect the lowering unemployment in Western Balkan Countries?
4. What are the macroeconomic indicators, and which are the social challenges?
5. What is the role of the EU in improving the economic situation of these countries?
6. If people spend more money, will the country earn more?
7. Is the fact the all these countries have different currencies one of the reason of high unemployment and if these countries would have the same currency how different it would be?