Suppose a factory that produces (x) electric ovens with a total cost function in the form: c(x) = 2x² + 4x + 450 a. Find the average cost function and the marginal cost function. b. Calculate the level of production (x) that minimizes the average cost function. What is the minimal average cost? c. Use marginal analysis to estimate the cost of manufacturing the 8th unit. What is its actual cost?