Step 4. In order to conjecture the circumstances in these two countries under free trade, consider the following hypothetical scenario based on Ricardian model. Assume throughout that those two countries (Italy and Sweden) are the only two countries in the world, at least for purposes of trade. There are two goods: shoes and calculators. Consumers in both countries always spend half of their income on shoes and half of their income on calculators. The only factor of production is labour. Each Italian worker can produce 1 shoe or 2 calculators per unit of time. Each Swedish worker can produce 4 shoes or 2 calculators per unit of time. There are 80 workers in Italy and 60 workers in Sweden. You need to provide conditions in each country by stating: a) Derive the relative demand curve relating the relative demand for calculators to the relative price of calculators. Do this algebraically, and then show what the curve looks like in a diagram (put the relative price of calculators on the vertical axis and the relative quantity of calculators demanded on the horizontal axis). b) Derive the world relative supply curve of calculators (put the relative price of calculators on the vertical axis and the relative quantity of calculators supplied on the horizontal axis)