Alphonse, A, and Brigitte, B, are food farmers. Each can produce 2 units of food for every hour that they work, denoted by ly with JE { A. B). They also have access to an oven to turn food into ready meals. This requires 2 units of raw food for each ready meal produced. Alphonse and Brigitte have preferences ry + 2,/up -= (ly)" where my is raw food consumption and y is consumption of ready meals. Suppose that Alphonse can copy Brigitte's new technology if she invests without having to pay the cost of 2. Explain why this makes the new technology a public good. Who gains/loses from this