1. Peter - he
2. mother - she, Mary - her
3. my friend - he (she)
4. Jane - she
5. his cousins - they
6. our grandmother and grandfather -they
7. Kate - she

2.
1. my
2. his
3. your
4. their
5. our
3.
1. her
2. his
3. their
4. my
5. our

1. that
2. these
3. those
4. this
5. these