Solution:When a price ceilling is set below the equilibrium price, quantity demanded will exceed| quantity supplied, and excess demand or shortages will result when a price floor is set above the equilibrium| price, the quantity supplied will exceed the quantity demanded, and excess supply or surpulses will result.
The shortage of the commodity and black marketing economy drives out legitimate industry that can't compete with the lower costs of illegal operations. Some black market players deliberately create shortages in legal goods to force people to purchase from them. The tax-free mature of the black market means the government losses revenue.