Answer:
preferred stock dividends = 6,000 preferred stocks x $15 x 6% = $5,400
common stocks outstanding = 1,300,000
a) $5,400 goes to preferred stockholders, dividend per preferred stock = $5,400 / 6,000 = $0.90
$25,000 - $5,400 = $19,600 goes to common stockholders, dividend per common stock = $19,600 / 1,300,000 = $0.015
b) $5,400 x 3 = $16,200 goes to preferred stockholders, dividend per preferred stock = $16,200 / 6,000 = $2.70
$30,000 - $16,200 = $13,800 goes to common stockholders, dividend per common stock = $13,800 / 1,300,000 = $0.0106
c) $5,400 goes to preferred stockholders, dividend per preferred stock = $5,400 / 6,000 = $0.90
$30,000 - $5,400 = $24,600 goes to common stockholders, dividend per common stock = $24,600 / 1,300,000 = $0.019