6) At the end of 2017, Apple had cash and short-term investments of $74.18 billion, accounts receivable of $17.87 billion, current assets of $128.65 billion, and current liabilities of $100.81 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 0.36, a quick ratio of 0.56 and a current ratio of 1.00. What can you say about the asset liquidity of Apple relative to HPQ?