2030 turbo engines, Russell at the back, Horner's book: how closely did you follow F1 this week?

This week's F1 headlines: Marko's turbo-engine announcement, Mercedes' cooling-vest controversy, Russell's Singapore grid penalty, the Horner-Schumacher book feud, and Alonso's future. Test how closely you were paying attention!

1. Which year did Helmut Marko predict for the return of turbo V8 engines in Formula 1?
2. Why didn't Mercedes develop a liquid-cooled vest for the Southeast Asian heat?
3. Why does George Russell have to start from the back of the field at the Singapore Grand Prix?
4. Who backed Ralf Schumacher when he called one of Christian Horner's claims a 'complete lie'?
5. What is the title of Christian Horner's autobiography, out on October 22?
6. What did Fernando Alonso agree favorable terms with Aston Martin about?
7. Did an official FIA decision announce the return of turbo V8 engines in 2030?