Знаю, что это легко, но я че то затупила,

1.Do shareholders elect a board of directors to oversee the main policies and decisions? (общий).

2. what do shareholders elect to oversee the main policies and decisions?(специальный)

3. who is elect a board of directors to oversee the main policies and decisions? (к подлежащему)

4. do shareholders or other people elect a board of directors to oversee the main policies and decisions?(альтернативный)

5. shareholders elect a board of directors to oversee the main policies and decisions, aren't they?(разделительный)