Alex Hayden is the sole stockholder and operator of Elevate and Succeed, a motivational consulting business. At the end of its accounting period, December 31 , 20Y7, Elev and Succeed has assets of $571,940 and liabilities of $180,730. Using the accounting equation and considering each case independently, determine the following amounts a. Stockholders' equity, as of December 31,20Y7. $ b. Stockholders' equity, as of December 31,20Y8, assuming that assets increased by $90,370 and liabilities increased by $54,330 during 20Y8. $ c. Stockholders' equity, as of December 31,20Y8, assuming that assets decreased by $45,180 and liabilities increased by $16,010 during 20Y8. $ d. Stockholders' equity, as of December 31,20Y8, assuming that assets increased by $75,500 and liabilities decreased by $28,600 during 20Y. $ e. Net income (or net loss) during 20Y8, assuming that as of December 31,20Y8, assets were $720,640, liabilities were $117,250, and there were no dividends and no additional common stock was issued. $