need help and answer for section B.

Amazon.com, Inc. (AMZN) is one of the largest Internet retailers in the world. Netflix, Inc. (NFLX) provides digital streaming and DVD rentals in the United States. Amazon streaming and digital services; however, Amazon also sells many other products through the Internet. The sales and total assets (in millions) from recent financial stateme follows for both companies: Amazon Netflix Total revenues (sales) $135,987 $8,831 Total assets: Beginning of year 64,747 10,203 End of year 83,402 13,587 a. Which of these assets are used by Netflix, Inc. to generate revenue?