Prob 9 13a. Figure A shows the number of newly initiated trade remedy investigations, including safeguard (SF), China safeguard (CSF), antidumping (AD), and countervailing duty (CVD) (a countervailing duty is used when foreign firms receive a subsidy from their government, and then the CVD prevents them from charging lower prices in the importing country). Each bar shows the number of new cases in each quarter of the year (Q1, Q2, etc.) for 2007 through Q1 of 2012. The number of cases is graphed separately for developing countries and developed countries. What does this graph tell us about what has happened to the number of such cases since 2007? What might have caused this pattern?