Citibank is a US Bank which lost US$500 million due to human error in August 2020. Read the case (paying special attention to the YouTube video) noted in the link below, and answer the following questions: a. Explain operation risk and discuss how it relates to this case (7.5 marks). b. Select a risk management model discussed in Unit 2 and demonstrate how this operation risk issue can be resolved through the application of such model (10 marks) c. Discuss how the new application discussed in the case can assist the Citibank to operate more effectively to serve its clients during the Covid-19 pandemic. (7.5 marks) The following will apply: The document should be presented in a format that covers all the requirements above and in a format that is presentable. The number of words in the plan document should not exceed 3,000 words. Students should make an effort to include at least ONE external reference in the responses to support the expressed opinions and assertions made. Students can use practitioner publications or formal websites such as Business Week, Fortune, Harvard Business Review, Wall Street Journal or professional websites to identify information in support of their responses. Students can also use academic research publications such as Academy of Management Journal, Journal of International Management. External references must be appropriately cited both in the body of the response as well as in a reference list at the end of the response, using American Psychological Association (APA) format. (APA Style, Version 7)