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:
| Rnd | Circuit | Sports +2.0 Winning Team | Sports 2.0 Winning Team | GT +2.0 Winning Team | GT 2.0 Winning Team | Results |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Augusta | #97 Shelby American | #77 Scuderia TinCan | #15 Shelby American | Porsche | Results |
| 1.0 | Augusta | Dave MacDonald | Charlie Hayes | Ken Miles | Bruce Jennings | Results |
| 2.0 | Pensacola | #66 Chaparral Cars | Lotus | #14 Shelby American | Lotus - Ford | Results |
| 2.0 | Pensacola | Jim Hall | Ed Hugus | Ken Miles | John Whitmore | Results |
| 3.0 | Riverside | #9 Nickey Chevrolet | Frank Arciero | #50 Shelby American | Porsche | Results |
| 3.0 | Riverside | Skip Hudson | Bobby Unser | Ken Miles | Scooter Patrick | Results |
| 4.0 | Laguna Seca | #366 Chaparral Cars | #77 Scuderia TinCan | Shelby | Porsche | Results |
| 4.0 | Laguna Seca | Jim Hall | Charlie Hayes | Ed Leslie | Don Wester | Results |
| 5.0 | Kent | #14 Shelby American | Lotus - Climax | #50 Shelby American | Porsche | Results |
| 5.0 | Kent | Dave MacDonald | Tony Settember | Ken Miles | Don Wester | Results |
| 6.0 | Watkins Glen | #66 Chaparral Cars | #71 Scuderia TinCan | #98 Shelby American | Stoddard Racing Team | Results |
| 6.0 | Watkins Glen | Jim Hall | Charlie Hayes | Ken Miles | Chuck Stoddard | Results |
| 7.0 | Greenwood | #96 Shelby American | #71 Ed Wechsler | #98 Shelby American | #15 Alan Mann | Results |
| 7.0 | Greenwood | Ed Leslie | Bill Wuesthoff | Ken Miles | John Whitmore | Results |
| 8.0 | Medowdale | #66 Chaparral Cars | #7 Robert Bosch | #98 Shelby American | Stoddard Racing Team | Results |
| 8.0 | Medowdale | Jim Hall | Joe Buzzetta | Ken Miles | Chuck Stoddard | Results |
| 9.0 | Mid-Ohio | #67 Chaparral Cars | #71 Robert Bosch | #99 Shelby American | #17 Robert Bosch | Results |
| 9.0 | Mid-Ohio | Hap Sharp | Bill Wuesthoff | Bob Johnson | Bill Wuesthoff | Results |
| 10.0 | Road America | #2 Mecom Racing Team | #79 Edward Weschler, Jr. | #99 Shelby American | #5 Stoddard Racing Team | Results |
Question:
What is the minimum rnd at Laguna Seca?
Answer:
4.0