The stockholders equity section of Ironworks is presented here. IRONWORKS Balance Sheet (partial) ($ and shares in thousands) Stockholders' equity: Preferred stock, $1 par value $5,500 Common stock, $1 par value 25,000 Additional paid-in capital 842,000 Total paid-in capital 872,500 Retained earnings 283,000 Treasury stock, 12,000 common shares (324,000) Total stockholders' equity $831,500 Based on the stockholders' equity section of Ironworks, answer the following questions. Remember that all amounts are presented in thousands. How many shares of preferred stock have been issued