Answer 1- Formal verification
Answer 2- A decent computer, an internet connection and 1 roll of Tez (8,000 XTZ)
Answer 3- The formal governance process
Here is the page of the quiz :
https://www.coinbase.com/earn/tezos
If you don't have an account yet, let us both get $10 each by having me be your refferal :)
https://www.coinbase.com/join/tattje_h