The graph below represents the market for walnuts. Identify the values of the marginal benefit and the marginal cost at the output levels of 2,000 pounds, 4,000 pounds and 6,000 pounds. At each of these output levels, state whether output is inefficiently high, inefficiently low, or economically efficient. 
Definitions:
Writing
The activity or skill of marking coherent words on paper and composing text.
Corporate Liability
Legal accountability or responsibility of a corporation for its actions or omissions, which can include financial obligations, damages, and penalties.
Dock Damage
Damage incurred to a dock or a vessel moored at a dock, usually due to accidents or natural events.
Shipping Ltd.
A type of business company specialized in the transportation of goods by sea.
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