Please help me answer the following q 3.3

Question 3. Capital management The table below is based on the annual financial statements of four major banks in Australia, ANZ Bank (ANZ), Commonwealth Bank of Australia (CBA), National Australia Bank (NAB) and Westpac Banking Corporation [WBC). \" w... FY21 FY20 FY21 FY20 FY21 FY21} Common Equity 12.3 11.3 13.1 11.6 13.0 11.5 12.3 11.1 Tier 1 {'11:} Tier 1 Capital {We} 14.3 13.2 15.7 13.9 14.5 13.2 14.7 13.2 Tier 2 Capital [9131 4.1 3.3 4.1 3.6 4.3 3.4 4.2 3.2 Total Regulatow 18.4 16.4- 198 17.5 18.9 18.8 18.9 16.4 Capital ratio 1%} 3.1. Based on your own research, why have some major Australian banks been engaging in share buybacks in the past year? Your answer should explain the meaning of share buybacks and outline their rationale in terms of capital adequacy and bank profitability. {5 marks] 3.2. Visit the websites of these banks and access the 2021 financial statements for each bank. Report the dollar values ofthe following for FY21: Common Equity Tier 1 (13) Tier1 Capital (%) Tier 2 Capital (0/0) Looking at the figures you have provided and the table above, rankthe banks from 1 (most likely) to 4 (least likely) in terms of your assessment of the banks being in a position to engage in a share buy-bank in 2022. Justify your reasoning based on your understanding of Basel ||| capital adequacy requirements. [5 marks] 3.3. You are having a discussion with your classmates and one of them makes the following observation. "In the corporate finance studies we learnt that credit risk is measured by the leverage ratio. Why then do we bother in this course to use riskadjusted capital measure instead of the leverage ratio?\" Respond, fullyjustifying your answer with example(s). {5 marks]