The country Midwest trades with the outside world and has no duties. After increased exports, the country reasons to start protecting its own industry that produces steel according to P = 10 + 3Q. The demand for steel is in the Midwest P = 50 -Q. The world market price of steel is 20. Calculate and illustrate the effects on price and quantity as well as the imports / exports that result from Midwest imposing a duty of 10. Calculate and comment on the direct welfare consequences in Midwest of the imposition of customs divided into producers, consumers, state and net.