At the end of 2017, Apple had cash and short-term investments of $73.88 billion, accounts receivable of $18.12 billion, current assets of $128.78 billion, and current liabilities of $100.38 billion. (Round to two decimal places.)

a. What was Apple's current ratio?

b. What was Apple's quick ratio?

c. What was Apple's cash ratio?

d. At the end of 2017, HPQ had a cash ratio of 0.36, a quick ratio of 0.51 and a current ratio of 1.03. What can you say about the asset liquidity of Apple relative to HPQ?