d) Consider designing a zoning policy under which the factories a required to locate in a particular region of the city. The location(s) is(are) chosen so as to minimize areas that are exposed to pollution in the city. What location(s) would you propose for Factory A and Factory B? [Hint: While designing the policy, recall that both factories can be located at the same spot. ] While the focus of the policy is to minimize the extent of area polluted, understand that any policy adopted will also be optimal for maximizing housing rent given pollution or minimizing the negative impact of pollution on housing rent. Using intuition of the monocentric city model, explain this claim. (1-2 sentences)