Using the financial data for Uber and Lyft for the fiscal year 2020, perform the required analyses:

($ millions)	Uber	Lyft
Net sales	$14,147	$3,209
Cost of goods sold	$7,832	$1,684
Gross profit	$6,315	$1,525
Operating expenses	$5,290	$1,222
Operating income	$1,025	$303
Interest and other (income) expense	$500	$150
Earnings before provision for income taxes	$525	$153
Provision for income taxes	$157	$46
Net earnings	$368	$107

Required: a. Calculate the gross profit margin, operating profit margin, and net profit margin for each company. b. Compute the return on equity (ROE) and return on assets (ROA) for both companies. Assume Uber's equity is $10,000 million and total assets are $25,000 million, while Lyft's equity is $3,500 million and total assets are $6,500 million. c. Determine the debt-to-equity ratio for both companies. d. Compare the profitability and efficiency of both companies based on your calculations. e. Discuss the financial leverage and operational efficiency of both companies.