At the end of 2017, Alphabet, Inc., reported stockholders equity of $152,502 million and total assets of $197,295 million. Its balance in stockholders equity at the end of 2016 was $139,036 million. Net income in 2017 was $12,662 million. a. Calculate Alphabet, Inc., return on equity ratio for 2017. (Round your answer to one decimal place.)

b. Calculate its debt-to-equity ratio as of December 31, 2017. (Hint: Apply the accounting equation to determine total liabilities.) Round your answer to one decimal place.