"Green bonds are essentially a Blue Ocean". a. Explain the strategy concept of 'blue ocean', generally and provide two additional examples from the business world (4 marks); b. Choi's team saw sustainability as good business practice rather than risk management. Discuss how this type of strategy applies to green bonds, along with offering any insights of the significant challenges and milestones regarding its progression as an approach to integrating sustainability by Choi's team. (8 marks) Total=12 marks