1. If a combination of goods is located above an economy's production possibility curve and above its consumption possibility curve, then:

   		this combination of goods is attainable regardless of whether the economy is open or closed.
   		this combination of goods is attainable only if the economy is closed but unattainable if it is open.
   		this combination of goods is attainable only if the economy is open but unattainable if it is closed.
   		this combination of goods is unattainable regardless of whether the economy is open or closed.