Based on the data given, the following is true:
The quantity being supplied at equilibrium depends on the number of producers who are willing to supply at the equilibrium price or lower.
All producers are willing to supply at $8 or lower in this scenario so the equilibrium quantity will be 6 bags.
Buyers are not willing to pay any amount for public goods because they expect it to be free.
Private sellers will therefore refuse to supply any good because they will not be paid for it.
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