Suppose the following two countries trade coffee beans with one another: Colombia (home) and Argentina (foreign). Both can be considered large countries since they produce a large proportion of the world coffee supply. Colombia is deciding whether to impose a tariff or an equivalent import quota:

- Using the supply and demand curves for both countries' domestic markets, show the effects on prices and welfare of the domestic country, effect on world prices, and on prices and welfare of the trading partner country, if Colombia imposes a tariff.

- Using the supply and demand curves for both countries' domestic markets, show the effects on prices and welfare of the domestic country, effect on world prices, and on prices and welfare of the trading partner country, if Colombia imposes an import quota.

- If Colombia was a small country, how would prices and welfare effects change for Colombia due to the import tariff?