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Assume labor (L) is the only variable input used in the production process, a firm's production function is given by Q=7L+10L2-L3 where Q represents total product. Classify the production function in to the three stages of production. Assume labor (L) is the only variable input used in the production process, a firm's production function is given by Q=7L+10L2-L3 where Q represents total product. Classify the production function in to the three stages of production