At the end of 2017, Apple had cash and short-term investments of $73.95 billion, accounts receivable of $17.64 billion, current assets of $128.79 billion, and current liabilities of $101.05 billion.

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 0.41, a quick ratio of 0.59 and a current ratio of 1.03. What can you say about the asset liquidity of Apple relative to HPQ?