Quantity Capital (K) Labor (L) 1 00 3 6 200 5 10 300 7.5 15 400 10 20 500 12.5 25 600 15 30 The table in the above gure shows the levels of output resulting from different levels of inputs. Which of the following conclusions can be drawn from this information? . Constant returns to scale exist throughout all levels of production. Increasing returns to scale exist between 100 and 200 units of output. Labor is subject to diminishing marginal productivity in the short run. No firm conclusions can be drawn