The diagram shows the outcome when a landowner, who had allowed motorists to park on his field at no cost, introduces a parking charge of $1.
What happens as a result of the change?
1 )
The landowner gains a surplus of Y + Z.
2 )
The motorist gains a surplus of X + Y.
The ownership of surplus Y changes.
4 )
There is a total surplus of X + Y + Z.
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