一、President Trump of the United States introduced reciprocal tariffs on other countries in April 2025. Please answer the following questions.
(一) Is the reciprocal tariff rate adopted by the United States the same as the optimal tariff rate in trade theory? If not, please explain in detail how each is determined and what objective each is intended to achieve. (When explaining the optimal tariff rate, please use a specific (per-unit) tariff as the example with a diagram including the relevant terms in trade theory.) (15 points)