You have been hired as a blockchain consultant by a finance company. The company is interested in using public blockchain for its financial operations. You have been asked to provide a brief report on public blockchain and its features that make it suitable for financial transactions.

Instructions:

1. Research and provide a brief overview of public blockchain. (25 marks)

2. List and explain the features of public blockchain that make it suitable for financial transactions. (25 marks)

3. Provide examples of companies that are currently using public blockchain for their financial operations. (25 marks)

4. Discuss any potential challenges or drawbacks of using public blockchain for financial transactions (25 marks)