Obtain Walmart's financial statements for the fiscal year ending January 2018, 2019, and 2020 from SEC.gov and do the following: (1) compute the value of the ratios listed below for three years- show all computations. (2 ) interpret the changes in Walmart risk ratios during the three- year period indicating any areas of concern.

Current Ratio:
Quick Ratio
Operating Cash Flow to Current Liabilities Ratio:
Days Accounts Receivable outstanding
Days Inventory held
Days Accounts Payable outstanding
Net Days Working Capital financing needed
Liabilities to Assets Ratio
Liabilities to Shareholders' Equity Ratio:
Long-Term Debt to Long-Term Capital Ratio
Long-Term Debt to Shareholders' Equity Ratio
Interest Coverage Ratio
Operating Cash Flow to Total Liabilities Ratio
Altman's Z-score
Probability of bankruptcy