Debtor who fails to appear at the creditors’ meeting

https://b-ok.cc/book/1225779/037f5d
Under Chapter 7, what may happen to a debtor who fails to appear at the creditors’ meeting when required?
For what is a bankruptcy trustee accountable?
Under Chapter 7, what is the highest priority class for payment of claims?
Under Chapter 7, what happens to the debtor’s remaining debts once the proceeds of the bankruptcy have been distributed?