Calculate the average product when the 2nd labour was employed 12.5

To calculate the average product of labor, we need to divide the total output by the number of units of labor employed. However, the question doesn't provide any information about the total output or the first labor unit. Therefore, we cannot accurately calculate the average product of labor when the second labor unit was employed at 12.5. In general, the average product of labor refers to the amount of output produced per unit of labor. If the total output is increasing at a decreasing rate as more labor is employed, then the average product of labor will eventually decrease. On the other hand, if the total output is increasing at an increasing rate as more labor is employed, then the average product of labor will eventually increase. Without additional information, it's not possible to determine the relationship between the total output and the number of labor units employed. Therefore, we cannot determine the average product of labor when the second labor unit was employed at 12.5.