Is Ea Id

Question 1

Masculine singular

Answer 1

Is
Eius
Ei
Eum
Eo

Question 2

Feminine singular

Answer 2

Ea
Eius
Ei
Eam
Ea

Question 3

Neuter singular

Answer 3

Id
Eius 
Ei
Id
Eo

Question 4

Masculine plural

Answer 4

Ei
Eorum
Eis
Eos
Eis

Question 5

Feminine plural

Answer 5

Eae
Earum
Eis
Eas
Eis

Question 6

Neuter plural

Answer 6

Ea
Eorum
Eis
Ea
Eis

Question 7

What is their function?

Answer 7

Is ea and Id are weakly demonstrative pronouns that are primarily used as a substitute for the missing 3rd person pronoun.
May also function as demonstrative adjectives.