Here are the answers to Exercise 1:
1. (See example above)
2. (a) and (b) words are [+human]
The (a) words are [+female]
The (b) words are [+male]
3. (a) and (b) words are [+animate]
The (a) words are [+human]
The (b) words are [+male animal]
4. (a) and (b) words are [+noun]
The (a) words are [+inanimate]
The (b) words is [+liquid food]