1) Please summarize the paper. 2) Describe one way that an email client could use a sandbox for hardening. 3) Suppose the application wants to open a file and read data from it. Which process performs the open() system call? The application or the agent? Which process performs the read() system call? The application or the agent? 4) Was there anything about the paper that you'd like to discuss in class? Or, what's the one thing you'd most like us to discuss in class today?