0. Summarize the paper.

1) Bitcoin's consensus mechanism tries to ensure that everyone has the same view of what transactions are in the blockchain. What happens if different parts of the Bitcoin network disagree on the set of valid transactions?

2) When a miner successfully mines a block (is the first to extend the existing chain by one block), they receive as reward (a) a mining reward and (b) transaction fees for transactions included in that block. What would go wrong if we eliminated these rewards?