7. The municipal water works of Cortland draws water from two sources: an underground spring and a nearby lake. Water from the spring costs 2 cents per 100 gallons to deliver and the spring has a capacity of 1 million gallons per day. Water from the lake costs 4 cents per 100 gallons to deliver and is available in unlimited quantities. The demand for water in the summer months in Cortland is P 20 0.001Q, where P is the price of water in cents per 100 gallons and Q is quantity demanded in hundreds of gallons per day. The demand curve for water in the winter months is P 10 0.001Q. If the water works wants to encourage efficient water use, how much should it charge for water in the summer months? In the winter months? LO3