Two firms compete in prices in the market for coffee in Washington Square Park. Demand is given by P=14-2Q, where P is the market price and Q is the total quantity demanded in the market. Joe's Coffee has a marginal cost of $4/unit while Jacqueline's Java has a marginal cost of $2/unit. Approximately how many units are sold in the market? Show your work. a. 10 b. 8 c. 6 d. 5 e. 3