Los ojos de mi amigo son verde gris azules café

The answer for the question is:

- Los ojos de mi amigo son azules.

Explanation:

In Spanish, different to the English, the adjectives have plural form, then, when the substantive has the plural form, the adjective must has it too, in the sentence you have written: "My friend's eyes are...", with eyes that are a plural noun, next to must be assigned an adjective, in this case, the one adjective that is in plural form is "azules", the others are in singular form.

c. encontramos

explanation:

if i am wrong i am sorry : )