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:
| Horizontal order | Height order | Soundfield type | Number of channels | Channels |
| --- | --- | --- | --- | --- |
| 1.0 | 0.0 | horizontal | 3.0 | WXY |
| 1.0 | 1.0 | full-sphere | 4.0 | WXYZ |
| 2.0 | 0.0 | horizontal | 5.0 | WXYUV |
| 2.0 | 1.0 | mixed-order | 6.0 | WXYZUV |
| 2.0 | 2.0 | full-sphere | 9.0 | WXYZRSTUV |
| 3.0 | 0.0 | horizontal | 7.0 | WXYUVPQ |
| 3.0 | 1.0 | mixed-order | 8.0 | WXYZUVPQ |
| 3.0 | 2.0 | mixed-order | 11.0 | WXYZRSTUVPQ |
Question:
If the channels is wxyzrstuvpq, what is the horizontal order?
Answer:
3.0