Please help on question "e." Thanks

2. (10 points) Consider a market in which the demand and supply curves are: QD=400072P Qs=-162.5+P/4 a) Calculate economic welfare in autarky with no government intervention. b) Calculate economic welfare in autarky with a tax of $360/unit c) Calculate economic welfare in autarky with a subsidy of $180/unit d) Calculate economic welfare with free trade with the rest of the world (and no tax) and PW of $800/unit. 6) Calculate economic welfare with free trade with the rest of the world and world price of $800/unit and a subsidy to producers of $200/unit