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:
| Rank | Couple | Judges | Public | Total | Vote percentage | Result |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Ray and Maria | 10.0 | 8.0 | 18.0 | 14.618% | Safe |
| 2.0 | Coleen and Stuart | 4.0 | 10.0 | 14.0 | 25.583% | Safe |
| 3.0 | Jessica and Pavel | 9.0 | 5.0 | 14.0 | 3.904% | Safe |
| 4.0 | Roxanne and Daniel | 6.0 | 6.0 | 12.0 | 9.009% | Safe |
| 5.0 | Donal and Florentine | 4.0 | 7.0 | 11.0 | 11.383% | Safe |
| 6.0 | Zoe and Matt | 8.0 | 3.0 | 11.0 | 3.311% | Safe |
| 7.0 | Todd and Susie | 1.0 | 9.0 | 10.0 | 23.472% | Safe |
| 8.0 | Ellery and Frankie | 4.0 | 4.0 | 8.0 | 3.672% | Safe |
| 9.0 | Michael and Melanie | 7.0 | 1.0 | 8.0 | 2.463% | Eliminated |
Question:
When roxanne and daniel are the couple what is the highest rank?
Answer:
4.0