Corporation Beta sells common stock for $50. The floatation cost for new issue of stocks will be 5 percent. The company pays 50 percent of its earnings in dividends, and a $4 dividend was recently paid. Earnings per share 5 years ago were $5. Earnings are expected to continue to grow at the same annual rate in the future as during the past 5 years. The tax rate is 25 percent. Calculate

(a) internal common equity and

(b) external common equity.