Inderline the relative clauses in sentence 1-6. Which are difining and which are non-defining?

1. That's the DVD player that I want to buy.
2. Friends, whichis on every Thursday, is a popular American show.
3. My mother, who is a TV producer, works very long hours.
4. The photo, which was taken by Man Ray, was sold for 1000 of pounds.
5. Isn't that the video shop where you used to work?
6. My brother, who is an actor, lives in London,

1. that I want to buy - defining 2. which is on every Thursday - non-defining 3. who is a TV producer - non-defining 4. which was taken by Man Ray - non-defining 5. that the video shop - defining6. who is an actor - non-defining