6

I believe that both the "d" and the "b" in 25 are fricatives, and I have transcribed them as such, but I'm not entirely sure.

They are fricatives, but you can just transcribe them as _d_ and _b_ since it is very predicatable where voiced fricatives and voiced stops appear in Mixtec: [b d g] only appear after nasal consonants, [β ð ɣ] occur in other contexts.