please help me i got stuck with this problem!:(

[Moon fairy21]

I tryed to solve it but i couldn't, so please help me with this issue.

what are the the prose rules that account for the alternation seen in these
phrases?
and

. What is the underlying representation of the [W] at the end of the word that means

'fish' in the phrase that means 'Khaled's fish'?

kit'a:p 'book'

kit'a:[f] 'fa'thi' 'fathi's book'
kit'a:p [p] sami':ra 'samira's book'
kit'a:p [p] ʃari':f 'sharif's book'
kit'a:p [p] x'a:lid ' khaled's book'
kit'a:p [p] h'asan 'hassan's book'

s'amak 'fish'

s'ama[k] fa'thi ' fathi's fish'
s'ama[k] sami':ra 'samira's fish'
s'ama[k] ʃari':f 'sharif 's fish'
s'ama[x] x'a:lid ' khaled's fish'
s'ama[k] h'asan 'hassan's fish'

bit 'daughter'

bi[t] fa'thi 'fathi's daughter'
bi[s] sami':ra 'samira's daughter'
bi[ʃ] ʃari':f 'sharif 's daughter'
bi[t] x'a:lid ' khaled's daughter'
bi[t] h'asan 'hassan's daughter'

[Soup]

The voicelss labial stop /p/ becomes a voicelss labial fricative [f] before /f/:

kit'a:/p/ 'book'
kit'a:[f] 'fa'thi' 'fathi's book'

The voiceless velar stop /k/ becomes a voiceless velar fricative [x] before /x/:

s'ama/k/ 'fish'
s'ama[x] x'a:lid ' khaled's fish'

The voiceless alveolar stop /t/ becomes a voiceless alveolar fricative [s] before /s/ and an alveopalatal fricative [ʃ] before /ʃ/.

bi/t/ 'daughter'
bi[s] sami':ra 'samira's daughter'
bi[ʃ] ʃari':f 'sharif 's daughter'

Rule
By process of regressive assimilation, voiceless stops /p, k/ and /t/ become voiceless fricatives [f, x] and [s, ʃ] respectively, thereby sharing manner of articulation with a following fricative.

[Moon fairy21]

Soup you are a genius. thank yousooooooooo much for helping me out. i was really desperate .you are superrrrrrrrr man.