An orbital mechanics database lists the orbital periods (in Earth years) of 11 newly discovered exoplanets:

| 1.4 | 0.8 | 12.5 | 3.2 | 0.5 | 9.7 | 22.1 | 0.1 | 4.6 | 15.3 | 8.8 |

A standard ascending bubble sort is carried out on this list.

State the number of comparisons that will be made on the first pass.