Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Tries | Player | Opponent | Score | Venue | Round |
| --- | --- | --- | --- | --- | --- |
| 4.0 | Israel Folau | Gold Coast Titans | 32–18 | Suncorp Stadium | Round 10 |
| 4.0 | Phil Graham | Brisbane Broncos | 56–0 | Canberra Stadium | Round 21 |
| 4.0 | Joel Moon | Penrith Panthers | 32–32 | CUA Stadium | Round 21 |
| 4.0 | Brett Morris | North Queensland | 20–24 | Dairy Farmers Stadium | Round 9 |
| 4.0 | Billy Slater | Manly Sea Eagles | 40–12 | Etihad Stadium | Qualifying Final |
Question:
What is the average number of tries of player israel folau?
Answer:
4.0