Even though free trade is better for all countries, we see in real-life applications that some countries are still imposing trade restrictions.

a)Please discuss the nature of these restrictions one by one. Provide diagrams if necessary to empower your answer.

b)Why do you think these restrictions are applied by governments even though they contradict countries' free trade and welfare?

c)Can you provide at least three recent policy examples to part (b) used by different countries?