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Introduction to Calculus in Economics (continued): In the previous Problem Set question, we started looking at the cost function O (r), the cost of a firm producing z items. An important microeconomics concept is the marginal cost, defined in (non-mathematical introductory) economics as the cost of producing one additional item. If the current production level is a items with cost G (2:), then the cost of computing / additionial items is C (z + h). The average cost of those h items is (C(z+h)-C(=)) As we analyze the cost of just the last item produced, this can be made into a mathematical model by taking the limit as h -> 0, he. the h derivative C (x). Use this function in the model below for the Marginal Cost function MC (x). Problem Set question: The cost, in dollars, of producing a units of a certain item is given by C (z) - 0.0223 - 10r + 300. (a ) Find the marginal cost function