Write a query that returns average users_rating and critics_rating for games with both ratings higher than or equal to 8 points. The table name is games.
| title | publisher | developer | users_rating | critics_rating |
|---|---|---|---|---|
| Vanguards | Art of Electro | Diamond Games | 8.6 | 8.2 |
| Hooligans 14 | Macrofiber | Turn 9 Studios | 8.5 | 8.4 |
| Ship Simulator 2 | Yson | Giraffe Tongue | 7.3 | 7.6 |
| Call of Honor | Art of Electro | Anvil & Hammer | 6.8 | 6.8 |
| Bridges | Kamino | Toroto Productions | 9.6 | 9.3 |