In 2018, ShopShop had EBIT of $7,000 million and a tax rate of 40%. At the beginning of the year, the firm had a book value of debt of $20,000 million and a book value of equity of $30,000 million. During the year, the firm spent $2,000 million in capital expenditure and $450 million in additional investment in working capital. Depreciation was $600 million. Estimate the expected growth rate of operating income. Select one: a. 3.7% b. 4.6% c. 4.1% d. 3.2%