Answer :
If the equilibrium price of a gallon of milk is $4 and if the government imposes a price floor of $5 per gallon then, the quantity supplied of milk will exceed the quantity demanded.
Price floor prevents a price from falling before a certain level. When a price floor is set above the equilibrium price, the quantity supplied will exceed quantity demanded, and excess supply or surpluses will result. On the other hand, when a price floor is set below the equilibrium price, quantity demanded will exceed quantity supplied and excess demand will result.
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