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:
| Engine | Exhaust Ports | Bypass Ports | Bypass Boosters | SPI | Tapered Grind | Number on cyl. |
| --- | --- | --- | --- | --- | --- | --- |
| Space Bug | Open | 2.0 | 0 | Yes | Yes | None |
| Thermal Hopper | Open | 2.0 | 0 | Yes | Yes | None |
| Space Bug Jnr | Open | 1.0 | 0 | Yes | Yes | None |
| Space Hopper | Open | 2.0 | 0, 2 side flutes in 1961 | Yes | Yes | None, #4 on 1961 models |
| Strato Bug | Open | 2.0 | 0 | Yes | Yes | None |
| Product Engine | Open | 1.0 | 0 | Yes | Yes, No after Leisure | 2 |
| SureStart | Slit | 2.0 | 1 | No | No | None |
| Babe Bee | Open | 1.0 | 0 | Yes | Yes, No after Leisure | 2 |
| Golden Bee | Open | 1.0 | 0 | Yes | Yes, No after Leisure | 2 |
| Black Widow pre 96 | Open | 2.0 | 0 | Yes | No | 1 |
| Black Widow post 96 | Slit | 2.0 | 1 | No | No | None |
| Texaco | Slit | 2.0 | 1 | No | No | None |
| QRC pre 96 | Open | 2.0 | 0 | No | No | 6 |
| QRC post 96 | Slit | 2.0 | 0 | No | No | None |
| Killer Bee ‘96 | Slit | 2.0 | 1 | Yes | Yes 1 | None |
| Killer Bee ‘02 | Slit | 2.0 | 1 | No | No | None |
| Venom | Open | 2.0 | 1 | Yes | Yes 1 | None |
| Medallion pre 96 | Open | 2.0 | 0 | Yes | No | 1 |
| Medallion post 96 | Slit | 2.0 | 0 | No | No | None |
| Medallion 051 | Slit | 2.0 | 1 | No | No | 7 |
| Tee Dee 049 | Open | 2.0 | 2 | Yes | Yes 2 | 4 |
Question:
How many bypass boosters are there on the engine with slit exhaust ports and SPI is yes?
Answer:
1.0