Simon Company's year-end balance sheets follow. At December 31 Assets Cash Accounts receivable, net Merchandise inventory Prepaid expenses Plant assets, net Total assets Current Year 1 Year Ago 2 Years Ago $38,600 50,500 $ 30,600 86,500 $ 36,000 61,500 110,000 82,200 52,500 10,650 9,250 5,400 278,000 250,000 $515,750 $446,950 227,000 $374,000 Liabilities and Equity Accounts payable $129,600 $ 72,250 $50,200 Long-term notes payable 96,000 101,500 83,000 Common stock, $10 par value 164,000 164,000 164,000 Retained earnings 126,150 109,200 76,000 Total liabilities and equity $515,750 $446,950 $374,000 For Year Ended December 31 Sales The company's income statements for the Current Year and 1 Year Ago, follow 1 Year Ago Current Year $715,000 $550,000 Cost of goods sold Other operating expenses Interest expense 221,650 11,900 Income tax expense $352,000 1 137,500 13,400 8,950 Total costs and expenses Net incone Earnings per share. 657,750 $57,250 13.49 511,850 $30,150 $ 2.33 For both the Current Year and 1 Year Ago, compute the following ratios (3-a) Compute return on total assets for the current year and one year ago. (3-b) Based on return on total assets, did Simon's operating efficiency improve or worsen in the Current Year versus 1 Year Ago?