Suppose the domestic demand and domestic supply are given by the following equations {this is the market under autarky, which means without international trade}, where P stands for price and Q stands for quantity. Demand [D]: PD = 40 - 0.5Q Supply (5}: P5 = 10 + Q However, once this market opens to international trade, supply increases and the new supply curve. including the world supply is given by the following: Supply (5]. Piworld} = '20 + Q Given this information, what is the domestic quantityr demanded with world trade