A small bakery is trying to determine how many bakers to schedule for a morning shift to maximize the production of artisanal bread loaves. The owner has collected the following data from past shifts, showing the relationship between the number of bakers working and the total number of loaves produced in a 4-hour period. All other resources (oven space, ingredients) are held constant.

**Production Data:**
| Number of Bakers | Total Loaves Produced |
|------------------|-----------------------|
| 1                | 20                    |
| 2                | 45                    |
| 3                | 65                    |
| 4                | 75                    |
| 5                | 80                    |

Based on the technical relationship shown in the data, which baker's addition to the team results in the smallest increase in total output? Explain your reasoning by describing the change in output as each new baker is added.