Compare the allophonic variants of the phoneme /k/ in the following word

Compare the allophonic variants of the phoneme /k/ in the following words and point out the differences.

1. kind

[k^haind]

Aspirated

standing in initial position of a stress syllables

2. sky

[skai]

Unspirated

standing after the sound /s/

3. looked 

[luk^°t]

Unexploded

standing before other Fortis plosive./.