Analyze Depreciation and Amortization Practices: Review Walmart inc approach to depreciating its PPE and amortizing its intangible assets. Determine methods used for depreciation $($e$.$g$.,$ straight$-$line, declining balance$)$ and amortization.

$-$ The estimated useful lives assigned to various assets and how they compare to industry norms.

$-$ Any changes in estimates or methods over time and the rationale provided.

$-$ The financial impact of these practices on the company$$s income statement and balance sheet.