Suppose 4 neighboring farmers want irrigation and flood control systems. Each farmer can install one system for $15,000, and is willing to do so. If 2 farmers go together they can build a joint system for $25,000, and 3 can build one system for a total of $30,000.A single system for 4 farms would be $44,000. What is the most efficient choice for all 4 farms? Does this technology possess economies of scale?