4 Tariffs. [20 points] In April 2018, the United States levied a 25 percent import duty on steel and a 10 percent import duty on aluminum. Show why this policy might make the United States more expensive relative to the rest of the world. Use the material covered in chapter 8 of the textbook to answer this question. Do not forget to provide the intuition behind your results. Do not forget to include all your derivation and equations