Using the following financial data for Walmart Inc. for the years 2018, 2019, and 2020, perform the required financial analysis:

	2018	2019	2020
Revenue	$500,343	$514,405	$524,000
Cost of Goods Sold	$373,396	$385,301	$393,000
Gross Profit	$126,947	$129,104	$131,000
Operating Expenses	$109,142	$112,000	$113,500
Operating Income	$17,805	$17,104	$17,500
Net Income	$9,862	$9,107	$14,881

	2018	2019	2020
Total Assets	$204,522	$219,295	$236,495
Total Liabilities	$122,693	$138,319	$147,095
Shareholders' Equity	$81,829	$80,976	$89,400

Requirements:

1. Calculate the gross profit margin for each year.
2. Determine the operating profit margin for each year.
3. Calculate the net profit margin for each year.
4. Compute the return on assets (ROA) for each year.
5. Compute the return on equity (ROE) for each year.
6. Evaluate the financial performance trend of Walmart Inc.