Answer:
1. No preferred dividends are in arrears at the current date.
Book value per share of common stock = Common Shareholder equity / Number of common stock shares
= (Total shareholders equity - Preferred stock) / Number of common stock shares
= (1,585,000 - 250,000) / 100,000
= $13.35 per share
2. Three years of preferred dividends are in arrears at the current date.
Preferred stock = (Preferred stock + Accumulated dividends)
= 250,000 + (6% * 250,000 * 3 years)
= 295,000 shares
Book value per share of common stock = (1,585,000 - 295,000) / 100,000
= $12.90 per share