Please answer each question in 3 paragraphs.

5. A Blockchain operates as a decentralized system usually using either POW or POS for consensus approvals, explain how consensus protocols work and what some of the tradeoffs of alternative consensus algorithms - proof-of- work, proof-of-stake are. In your answer explain what happens if a malicious agent tries to gain majority control over the hash rate (known as a 51% attack), how has this worked in the past and is it possible to protect against this attack and how? 6. What is Ethereum, how does it work, its applications, its importance to crypto, its transition to 2.0 and what generally distinguishes it from Bitcoin? 5. A Blockchain operates as a decentralized system usually using either POW or POS for consensus approvals, explain how consensus protocols work and what some of the tradeoffs of alternative consensus algorithms - proof-of- work, proof-of-stake are. In your answer explain what happens if a malicious agent tries to gain majority control over the hash rate (known as a 51% attack), how has this worked in the past and is it possible to protect against this attack and how? 6. What is Ethereum, how does it work, its applications, its importance to crypto, its transition to 2.0 and what generally distinguishes it from Bitcoin