Note: more than one answer is correct, and picking wrong answers has a penalty. Pick all and only the correct answers for full credit. Compared with equilibrium, a tax on a good will certainly.... Select one or more: a. increase consumer surplus b. decrease consumer surplus c. increase producer surplus Od decrease producer surplus e. increase the quantity of trade Of. decrease the quantity of trade g. increase economic efficiency Oh. decrease economic efficiency A shortage will occur and will continue when there is Select one: O a. a price ceiling below the equilibrium price. O b. a price ceiling above the equilibrium price. Oc. a price floor below the equilibrium price. Od. a price floor above the equilibrium price. O e. a tax on the good. Of. equilibrium.