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Consider the following table, which shows the output level (Q) associated with each combination of labor (L) and capital (K) used K=0 K=1 K=2 K=3 K=4 K=5 0 0 0 0 10 15 19 23 26 0 13 20 26 30 33 =3 0 16 24 30 35 39 L=4 0 18 26 34 40 44 L =5 0 19 29 37 44 49 When 5 units of capital (K) are employed, the marginal productivity of the 30 unit of labor (L) is . 39 0 4 0 2 O 13 0 5 0 6