29) [15 points] A bakery operating in the short run has found that when the level of employment in its baking room was increased from 4 to 10, in increments of one (like 4, 5, 6,.....), its corresponding levels of production of bread were 110, 115, 122, 127, 130, 132, and 133. a. Calculate the marginal product of labor. b. Explain and examine on the graph whether this production function exhibits diminishing marginal productivity of labor