Using the following financial data of Nike Inc. for the years 2018, 2019, and 2020, answer the questions below:

	2018	2019	2020
Sales	$36,397	$39,117	$37,403
Cost of Sales	$20,862	$21,930	$21,071
Gross Profit	$15,535	$17,187	$16,332
Operating Expenses	$9,807	$10,234	$11,153
Operating Income	$5,728	$6,953	$5,179
Net Income	$1,933	$4,029	$2,539

	2018	2019	2020
Total Assets	$22,536	$23,717	$31,342
Total Liabilities	$12,901	$12,932	$19,199
Shareholders' Equity	$9,635	$10,785	$12,143

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. Provide an analysis of Nike Inc.'s financial performance over these three years.