Analyze the financial data of Tesla Inc. provided below for the years 2018, 2019, and 2020:

	2018	2019	2020
Sales	$21,461	$24,578	$31,536
Cost of Goods Sold	$16,912	$18,516	$22,466
Gross Profit	$4,549	$6,062	$9,070
Operating Expenses	$4,315	$4,792	$5,894
Operating Income	$234	$1,270	$3,176
Net Income	-$976	$862	$1,751

	2018	2019	2020
Total Assets	$29,740	$34,309	$52,148
Total Liabilities	$23,405	$26,134	$28,418
Shareholders' Equity	$6,335	$8,175	$23,730

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. Discuss the financial performance trend of Tesla Inc.