6.2 In a manufacturing plant, workers use a specialized machine to produce belts. A new labor-saving machine is invented. With the new machine, the firm can use fewer workers and still produce the same number of belts as it did using the old machine. In the long run, both labor and capital (the machine)

are variable. From what you know, what is the effect of this invention on the APL, MPL, and returns to scale? If you require more information to answer this question, specify what else you need to know. L-9687