Name the ratio(s) that should be used to help answer each of the following questions. 

a. How efficient is a company at using its assets to produce sales? 

b. What is the company’s ability to pay its obligations immediately without selling inventory? 

c. How long does it take to purchase inventory, sell it on account, and collect the cash? 

d. How many dollars of profit were earned for each dollar invested by the shareholders? 

e. How able is a company to pay interest charges as they come due?