Ex 3
a. her
b. My
c. our
d. Your
e. his
Ex 4
a. my uncle
b. my grandmother
c. my nephew
d. my cosins
e. my nephew
Ex 5
a. yours
b. hers
c. theirs
d. his
Ex 6
a. Barbara is Peter's sister
b. my brother is tall, yours is short
c. This bag is mine
d. my cousins books are heavy
e. their parents are happy