The three bacterial markers a, b, and c are linked, but their order is unknown. A cotransduction experiment is performed and the following results are obtained.

- Markers a and b are co-transduced at a frequency of 2%.
- Markers a and c are co-transduced at a frequency of 20%.
- Markers b and c are co-transduced at a frequency of 65%.

What can be concluded about the arrangement of the three markers on the bacterial chromosome?