5. A glass manufacturer's production function is = 10L3 K % .Its marginal product functions are MP, = 5K3L-3 = 4 and MPy 5K-3L3 = -&? Suppose that its wage, W, is 81 per hour and the rental hour of capital, r, is 4. a. Draw a figure showing how the glass firm minimizes its costs of production. b. What is the equation of the (long-run) expansion path for a glass firm? c. Derive the long-run total cost curve equation as a function of