Please answer all 4 questions as soon as possible !

1. Why do investors purchase common shares? What are some of the main reasons for selecting this type of investment? Q2. Why would an investor choose preferred shares as an investment? Q3: Why would a company issue preferred shares over: Debt Securities: Common Stock: Q4. If the shareholder of record date was Monday, March 21, what is the last day of the cum: dividend period and the first day of the ex-dividend date