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 Liabilities and Equity Accounts payable Long-term notes payable Common stock, $10 par value Retained earnings Total liabilities and equity Current Year 1 Year Ago 2 Years Ago $ 30,800 89,600 112,000 10,950 280,000 $ 523,350 $ 129,200 96,000 161,500 136,650 $523,350 49,000 53,500 $ 36,500 63,000 $ 37,000 83,200 9,450 4,400 259,000 234,000 $377,900 $ 72,250 $ 50,800 101,000 161,500 81,808 161,500 116,400 83,800 $ 451,150 $ 451,150 $ 377,900 The company's income statements for the Current Year and 1 Year Ago, follow. For Year Ended December 31 Sales Cost of goods sold Interest expense Other operating expenses Income tax expense Total costs and expenses Net income Earnings per share Current Year $775,000 $ 449,500 240,250 11,300 9,350 $620,000 1 Year Ago $ 390,600 148,800 13,000 8,700 710,400 $ 64,600 561,100 $ 58,900 $4.00 $3.65 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?