Refer to ENR-2016, 2017, 2018 International Construction Issues (Engineering News Record articles) posted and answer the following questions.

1. Compare and discuss the international construction share of American Contracts for the year 2015, 2016 and 2017 including their share in different geographical regions.  
2. Which international contractors (nation of origin) have the greatest presence in the Continent of Africa? Discuss why they are so successful in flourishing in this region.
3. ""Escalating trade wars and economic protectionism, along with increasing restrictions on the free movement of labor, have the potential to negatively impact prospects in the international design market" Support this statement with a few examples from these ENR articles.
4. Compare the market share of the top international contractors from the year 2015 to 2017 from the three ENR articles posted. Analyze and outline the major trends.