From the following table, calculate marginal revenue and average revenue.
| Output: | 1 | 2 | 3 | 4 | 5 | | Total revenue: | 10 | 18 | 24 | 28 | 30 |
| Output | Total revenue | Marginal revenue | Average revenue | | 1 | 10 | 10 | 10 | | 2 | 18 | 8 | 9 | | 3 | 24 | 6 | 8 | | 4 | 28 | 4 | 7 | | 5 | 30 | 2 | 6 |