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4. In July 2017 , Apple had cash of $7.12 billion, current assets of $18.75 billion, current liabilities of $6.99 billion, and inventories of $0.25 billion. ( 20 marks) a. What was Apple's current ratio? (4 marks) b. What was Apple's quick ratio? (4 marks) c. In July 2017 , Dell had a quick ratio of 1.25 and a current ratio of 1.30. What can you say about the asset liquidity of Apple relative to Dell? (4 marks) d. If Apple borrow on a short-term basis and use the funds to build up cash account, what is the effect on current ratio? Why? (8 marks)