Liquidity ratios. Edison, Stagg, and Thornton have the following financial information at the close of business on July 10:

Edison Stagg Thornton
Cash $6,000 $5,000 $4,000
Short-term investments 3,000 2,500 2,000
Accounts receivable 2,000 2,500 3,000
Inventory 1,000 2,500 4,000
Prepaid expenses 800 800 800
Accounts payable 200 200 200
Notes payable: short-term 3,100 3,100 3,100
Accrued payables 300 300 300
Long-term liabilities 3,800 3,800 3,800

Compute the current and quick ratios for each of the three companies. (Round calculations to two decimal places.) Which firm is the most liquid? Why?