Plz hep me!

What is worker productivity when it comes to economic growth? How can we express this productivity? What is it dependent on? State three policies the government can implement to improve workers productivity. State 3 arguments in favor of protectionism (in favor of trade restrictions}. Please state your own opinion about the validity of each one and whether you support such argument. Explain the difference between currency devaluation and currency depreciation. What's a major benefit for a nation to devalue its currency