Graph 9-6
This graph refers to the market for oil in Spain. 
-According to Graph 9-6, producer surplus in Spain before trade would be:
Definitions:
Impossibility
A situation or condition in which something cannot be done or achieved, often due to external factors.
Carrier
An individual or organization in the business of transporting goods or people.
Shipment
The act of transporting goods from one location to another, typically involving a transfer of possession from the seller to a carrier.
Tracking Information
Involves the details provided by shipping or courier services about the status and progress of a shipment's journey from origin to destination.
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