Free trade\’s pro and con in dealing the real world issues.

2. one source in writing this essay.
Write a report based on the article provide to discuss about what should we do to deal with the free trade?
Does the free trade have a cost to us?
What is the tariff\’s effect on the free trade?
Does the tariff or quota protect our domestic production?
Is this a good way to do? Briefly discusses about the assumptions of the standard economic analysis of this issue?
and try to apply the economic knowledge to the real-world issues.