Help me on three of the questions I'm stuck.

he paralegal working on a confidential memo for a client has accidentally sent it to opposing counsel. he supervising attorney, visibly upset, has given instructions all on how to handle the situation. 1. What is the potential of fact of the email and confidential information to the opposing party? 2. What steps should be taken in your jurisdiction when email is inadvertently sent to the wrong party? 3. Who is ultimately responsible and what are the penalties of inadvertent disclosure of confidential information by email