Table 10-4 Quantity (Units) Private Value (Dollars) Private Cost (Dollars) External Cost (Dollars) 1 46 21 6 2 44 24 6 3 42 27 6 4 40 30 6 5 38 33 6 6 36 36 6 7 34 39 6 Refer to Table 10-4. The table represents a market in which a. there is a positive externality. b. there is a negative externality. c. The answer cannot be determined from inspection of the table. d. there is no externality