The table below illustrates the total utility derived by an individual from consuming bottles of sparkling water.
| Quantity of Sparkling Water | Total Utility (Utils) |
|---|---|
| 1 | 15 |
| 2 | 28 |
| 3 | 39 |
| 4 | 48 |
| 5 | 55 |
| 6 | 60 |
| 7 | 63 |
What is the marginal utility derived from consuming the fourth bottle of sparkling water?
888
999
111111
121212
