Language Structure Problems

Basque

Examine these data from Basque and answer the questions
.


1. asko - many
2. handi - big
3. zabel - wide
4. senar - husband
5. esku - hand
6. azal - bark
7. hezur - bone
8. hotz - cold
9. zahar - old
10. bizkar - back
11. adar - horn
12. sudur - nose
13. sabel - belly
14. izar - star

What is the status of the fricatives [s] and [z] in the data?
.
. That is, are they allophones of the same or of different phonemes?