The table below shows how a firm's total and average product change, in the short run, with different inputs of labour.
| Number of workers | Total product | Average product |
|---|---|---|
| 3 | 90 | 30 |
| 4 | 160 | 40 |
| 5 | 250 | 50 |
| 6 | 318 | 53 |
| 7 | 350 | 50 |
Diminishing marginal returns to labour set in when the firm employs
4 workers
5 workers
6 workers
7 workers
