What is the difference between the following?
a) Cross-sectional and time-series analysis
b) The current ratio and the quick ratio
c) Receivables turnover, inventory turnover, and fixed asset turnover
d) The gross profit margin, the operating profit margin, and the net profit margin
e) The return on assets and the return on equity
f) Debt to total assets and debt to equity
g) Times-interest-earned and times-dividend-earned