4. Consider the Ricardian model given in Question 3 of Assignment 1. (a) Derive the relative demand curve relating the relative demand for Radios to the relative price of Radios. Do this algebraically, and then show what the curve looks like in a diagram (put the relative price of Radios on the vertical axis and the relative quantity of Radios demanded on the horizontal axis). (2 marks) (b) Derive the world relative supply curve of Radios (put the relative price of Radios on the vertical axis and the relative quantity of Radios supplied on the horizontal axis). (2 marks) (c) Put in the same gure the relative demand curve for Radios that you found in part (a) and the world relative supply curve of Radios that you found in part (b). Determine the equilibrium relative price of Radios and the equilibrium relative quantity of Radios under free trade. (2 marks) ((1) Under free trade, which country produces which good(s)? How many units? (2 marks) (e) Who gains from trade? 1Who loses from trade? State labours' stance towards free trade in each country. (2 marks)