[TwentyPercentCooler]

I think I got through the first lesson fine, which is good because I was beginning to get annoyed at that guy who kept asking me if a pen was a book. The second lesson was about two of the ways the no particle can be used and I think I've made a few mistakes here so could somebody please go though my answers and point out any mistakes and provide the correct answers:

1) Question: Translate "that wooden desk is my elder brother's"
My answer: kore wa ani no moku no tsukue desu

(follows the same pattern after this)

2) My father's car is Japanese
Watashi no outosan wa Nihon no kuruma desu

3) Is your mother a teacher?
(Totally lost on this one)

4) These are English flowers
Kore wa igirisu no hana desu

5) These pencils are not my elder sister's
Kore wa aneesan no enpitsu de wa arimesan

6) That boy over there is my younger brother's friend
(Totally lost again)

7) These televisions are not Japanese. They are British.
Kore wa Nihon no teribi de wa arimasen. Kore wa igirisu desu.

8) Is that picture yours? No, it's my grandfather's.
Dere wa anata no e desu ka? Iie, kore wa ojiisan no desu.

I'm fine with kana but please don't use kanji, I've barely learned any yet! Thanks for your help.