The balance sheet and income statement shown below are for Koski Inc. Note that the firm has no amortization charges, it does not lease any assets, none of its debt must be retired during the next 5 years, and the notes payable will be rolled over. Balance Sheet (Millions of $) Assets 2019 Cash and securities Accounts receivable Inventories $4,200 17,500 20,300 Total current assets Net plant and equipment Total assets $42,000 $28,000 $70,000 Liabilities and Equity $27,531 12,369 Accounts payable Accruals Notes payable Total current liabilities 5,000 $44,900 $9,000 $53,900 $3,864 Long-term bonds Total liabilities Common stock Retained earnings Total common equity Total liabilities and equity 12,236 $16,100 $70,000 Income Statement (Millions of $) 2019 Net sales Operating costs except depreciation Depreciation $112,000 104,160 2,240 $5,600 840 Earnings before interest and taxes (EBIT) Less interest Earnings before taxes (EBT) Taxes $4,760 1,190 Net income $3,570 500.00 $1249.50 Other data: Shares outstanding (millions) Common dividends (millions of $) Int rate on notes payable & L-T bonds Federal plus state income tax rate Year-end stock price 6% 25% $68.54 Refer to Exhibit 4.1. What is the firm's ROE? Do not round your intermediate calculations. O a. 22.17% O b. 21.46% O c. 13.84% O d. 13.30% O e. 15.97%