Q5. A firm sells two products, x and y. The demand for each product are: 100 – Pr – Py and y 200 – 2py – Px The joint-cost function is: TC = x² + xy + y i. How many units of x and y should be sold to...

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Extracted text: Q5. A firm sells two products, x and y. The demand for each product are: 100 – Pr – Py and y 200 – 2py – Px The joint-cost function is: TC = x² + xy + y i. How many units of x and y should be sold to obtain a relative maximum profit for the monopolist? Use the second-order derivative test to justify the answer.