St.Petersburg Corporation Use the Information Obtained from the Comparative Financial Statements Included

St.Petersburg Corporation
Use the information obtained from the comparative financial statements included in the St.Petersburg Corporation's 2012 annual report that is presented below to answer the questions that follow.All amounts are in thousands of dollars.
Refer to the financial information for St.Petersburg Corporation.
REQUIRED:
(A)Identify the two components of the return on assets ratio for St.Petersburg.Explain the change in the return on assets ratio during 2012 as it relates to these components.
(B)During 2012,how much is St.Petersburg's average cost of borrowed capital as compared to the cost of the money provided by the preferred stockholders? Which is the more profitable? Explain.