Can you please check where I went wrong on the following three problems please? Thank you.

Common Stockholders' Profitability Analysis A company reports the following: Net income $280,000 Preferred dividends 11,200 Average stockholders' equity 2,222,222 Average common stockholders' equity 1,233,028 Determine (a) the the return on stockholders' equity and (b) the return on common stockholders' equity. If required, round your percentages to one decimal place. a. The rate earned on stockholders' equity 12.6 % b. The rate earned on common stockholders' equity 12.8 x % Feedback Check My Work a. Divide net income by average total stockholders' equity. b. Divide net income minus preferred dividends by average common stockholders' equity. Horizontal Analysis The comparative temporary investments and inventory balances of a company follow. Current Year Previous Year Accounts payable $63,580 $57,800 Long-term debt 37,422 48,600 Based on this information, what is the amount and percentage of increase or decrease that would be shown on a balance sheet with horizontal analysis? Amount of Change Increase/Decrease Percentage Accounts payable 5,780 Increase 10 % Long-term debt -11,178 x Decrease -23 % Feedback Check My Work Calculate the change in the amount and divide by the base (older) year amount to determine the horizontal analysis percentages. The following information was taken from the financial statements of Tolbert Inc. for December 31 of the current fiscal year: Common stock, $25 par value (no change during the year) $5,500,000 Preferred $10 stock, $200 par (no change during the year) 6,000,000 The net income was $828,000 and the declared dividends on the common stock were $55,000 for the current year. The market price of the common stock is $16.80 per share. For the common stock, determine (a) the earnings per share, (b) the price-earnings ratio, (c) the dividends per share, and (d) the dividend yield. If required, round your answers to two decimal places. a. Earnings per Share 2.4 b. Price-Earnings Ratio 7 c. Dividends per Share 0.25 d. Dividend Yield 0.01 X % Feedback Check My Work a. Divide net income minus preferred dividends (Preferred stock + par value)