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 | Entrant | Chassis | Engine | Pts. |
| --- | --- | --- | --- | --- |
| 1974.0 | Token Racing | Token RJ02 | Cosworth V8 | 0.0 |
| 1974.0 | Chequered Flag | Brabham BT42 | Cosworth V8 | 0.0 |
| 1975.0 | Frank Williams Racing Cars | Williams FW03 | Cosworth V8 | 0.0 |
| 1976.0 | Stanley BRM | BRM P201B | BRM V12 | 0.0 |
| 1977.0 | Hesketh Racing | Hesketh 308E | Cosworth V8 | 0.0 |
Question:
What is the latest year that has an engine of cosworth v8, with a chassis of hesketh 308e?
Answer:
1977.0