insolvent/bankrupt

  1. The company has become insolvent.
  2. The company has become bankrupt.
  3. The company has declared it is insolvent.
  4. The company has declared it is bankrupt.
    Do ‘insolvent’ and ‘bankrupt’ mean the same?
    Can a company itself declare it is insolvent/bankrupt or only
    a court can declare a company insolvent/bankrupt?
    Please comment.