Identify distinctive phonemes in the words listed below and then assign a feature matrix using [+\-] binary features: cool vs. tool, wine vs. pine, lead vs. lid, turn vs. tin, feature vs. teacher.

1. cool vs. tool
- /k/ vs. /t/
Feature matrix:
| | +consonantal | +sonorant | +continuant | +voice | -nasal | -strident |
|---|--------------|-----------|-------------|--------|--------|-----------|
| /k/ | + | - | - | - | - | - |
| /t/ | + | - | - | - | - | - |

2. wine vs. pine
- /w/ vs. /p/
Feature matrix:
| | +consonantal | +sonorant | +continuant | +voice | -nasal | -strident |
|---|--------------|-----------|-------------|--------|--------|-----------|
| /w/ | + | + | + | + | - | - |
| /p/ | + | - | - | - | - | + |

3. lead vs. lid
- /d/ vs. /l/
Feature matrix:
| | +consonantal | +sonorant | +continuant | +voice | -nasal | -strident |
|---|--------------|-----------|-------------|--------|--------|-----------|
| /d/ | + | + | + | + | - | - |
| /l/ | + | + | + | - | - | - |

4. turn vs. tin
- /r/ vs. /n/
Feature matrix:
| | +consonantal | +sonorant | +continuant | +voice | -nasal | -strident |
|---|--------------|-----------|-------------|--------|--------|-----------|
| /r/ | + | + | + | - | - | - |
| /n/ | + | + | + | - | + | - |

5. feature vs. teacher
- /f/ vs. /tʃ/
Feature matrix:
| | +consonantal | +sonorant | +continuant | +voice | -nasal | -strident |
|----|--------------|-----------|-------------|--------|--------|-----------|
| /f/ | + | - | + | - | - | + |
| /tʃ/| + | - | + | - | - | + |

1. cool vs. tool

- Distinctive phoneme: /u/ vs. /ʊ/
- Feature matrix:
- | Phoneme | Back | Round |
- |---|---|---|
- | /u/ | - | - |
- | /ʊ/ | - | + |

2. wine vs. pine

- Distinctive phoneme: /w/ vs. /p/
- Feature matrix:
- | Phoneme | Labial | Voiced |
- |---|---|---|
- | /w/ | + | + |
- | /p/ | + | - |

3. lead vs. lid

- Distinctive phoneme: /ɪ/ vs. /i/
- Feature matrix:
- | Phoneme | High | Front |
- |---|---|---|
- | /ɪ/ | - | + |
- | /i/ | + | + |

4. turn vs. tin

- Distinctive phoneme: /r/ vs. /n/
- Feature matrix:
- | Phoneme | Nasal | Coronal |
- |---|---|---|
- | /r/ | - | + |
- | /n/ | + | + |

5. feature vs. teacher

- Distinctive phoneme: /tʃ/ vs. /t/
- Feature matrix:
- | Phoneme | Voiced | Affricate |
- |---|---|---|
- | /tʃ/ | - | + |
- | /t/ | - | - |