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:
| Year | Chassis | Engine | Tyres | Points |
| --- | --- | --- | --- | --- |
| 2002.0 | TF102 | Toyota V10 | M | 2.0 |
| 2003.0 | TF103 | Toyota V10 | M | 16.0 |
| 2004.0 | TF104 TF104B | Toyota V10 | M | 9.0 |
| 2005.0 | TF105 TF105B | Toyota V10 | M | 88.0 |
| 2006.0 | TF106 TF106B | Toyota V8 | B | 35.0 |
| 2007.0 | TF107 | Toyota V8 | B | 13.0 |
| 2008.0 | TF108 | Toyota V8 | B | 56.0 |
| 2009.0 | TF109 | Toyota V8 | B | 59.5 |
Question:
Tell me the average points with tyres of b and chassis of tf109
Answer:
59.5