The graph shows the price of a good compared to the quantity demanded and the quantity supplied. A graph titled Price Controls Graph 1 has Quantity on the x-axis and price on the y-axis. Demand has a negative slope and supply has a positive slope. Points are on the demand line and the supply line at the same price. Excess demand is indicated between the 2 points. Both points are below the point of equilibrium. On this graph, what does the green arrow represent? an ineffective price floor set above equilibrium causing a surplus. an effective price floor set below equilibrium causing a shortage. an ineffective price ceiling set above equilibrium causing a surplus. an effective price ceiling set below equilibrium causing a shortage.