1. Given the terms of trade information in the table below, answer the following questions: (1) What's the meaning of the terms of trade? (6 points) (2) Which countries' terms of trade improved between 2010 and 2020? (3 points) (3) Which countries' terms of trade worsened between 2010 and 2020? (3 points) (4) Which country's terms of trade did not change between 2010 and 2020? (3 points)