Addai Company has provided the following comparative information:

Line Item Description20Y820Y720Y620Y520Y4Net income$273,406$367,976$631,176$884,000$800,000Interest expense616,047572,003528,165495,000440,000Income tax expense31,74953,560106,720160,000200,000Total assets (ending balance)4,417,1784,124,3503,732,4433,338,5002,750,000Total stockholders equity (ending balance)3,706,5573,433,1523,065,1762,434,0001,550,000Average total assets4,270,7643,928,3973,535,4723,044,2502,475,000Average total stockholders' equity3,569,8553,249,1642,749,5881,992,0001,150,000

You have been asked to evaluate the historical performance of the company over the last five years.

Selected industry ratios have remained relatively steady at the following levels for the last five years:

Line Item Description20Y420Y8Return on total assets28%Return on stockholders equity18%Times interest earned2.7Ratio of liabilities to stockholders equity0.4

Required:

1. Determine the following for the years 20Y4 through 20Y8 for each of the graphs below. Use the amounts given above in your calculations. Round to one decimal place:

a. Return on total assets: