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 $ 35,625 62,500 $ 37,800 $ 31,800 89,500 112,500 10,700 278,500 $ 523,000 $ 129,900 82,500 9,375 255,000 $ 445,000 $ 75,250 101,500 98,500 163,500 131,100 163,500 104,750 $ 523,000 $445,000 For both the current year and one year ago, compute the following ratios: 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 50,200 54,000 5,000 230,500 $ 377,500 $ 51,250 83,500 163,500 79,250 $ 377,500 Current Year 1 Year Ago $ 673,500 $ 532,000 $ 411,225 209,550 12,100 9,525 $ 31,100 $ 345,500 134,980 13,300 8,845 642,400 $ 1.90 502,625 $ 29,375 $ 1.80 For both the Current Year and 1 Year Ago, compute the following ratios: (1-a) Profit margin ratio. (1-b) Did profit margin improve or worsen in the Current Year versus 1 Year Ago? (2) Total asset turnover. (3-a) Return on total assets. (3-b) Based on return on total assets, did Simon's operating efficiency improve or worsen in the Current Year versus 1 Year Ago