Look at the following graph and production schedule. At which additional worker does diminishing returns begin? Graph titled Total Production in Thousand Pounds/day. The x axis is number of workers with coordinates of 0, 2, 4, 6, 8. The y axis is thousand pounds per day with coordinates of 0, 10, 20, 30, 40, 50, 60, 70. There are 7 plotted points at (0,0), (1,15), (2,35), (3,50), (4,60), (5,65), (6,65). Number of workers Total Production in thousand pounds/day 0 0 1 15 2 35 3 50 4 60 5 65 6 65 Question 12 options: a) 4 b) 6 c) 5 d) 3