O x is the price in dollars per unit that consumers are willing to pay for x units of an item and S x is the price in dollars per unit that producers are willing to accept for x units Find a the equilibrium point b the consumer surplus at the equilibrium point and c the producer surplus at the equilibrium point D x x 9 S x x 4x 15 a What are the coordinates of the equilibrium point 3 36 Type an ordered pair b What is the consumer surplus at the equilibrium point Round to the nearest cent as needed