Calculate the annual cash dividends required to be paid for each of the following preferred stock issuances: a. $2.50 cumulative preferred, no par value; 700,000 shares authorized, 570,000 shares issued, 30,000 shares held as treasury stock. b. 7 percent, $50 par value preferred; 300,000 shares authorized, 224,000 shares issued and outstanding. c. 7.5 percent cumulative preferred, $50 stated value, $52 liquidating value; 240,000 shares authorized, 192,000 shares issued, 128,000 shares outstanding.