The script should run every 30 minutes using a cron job under user "bill" and work exactly as described in the man page accompanying this exercise. When a zombie is detected a log message is appended to /tmp/zombie-logs. The message is: "Detected zombie process: 234. User: bob. Successfully killed." (where the PID of the zombie is inserted in place of "234", and the username is in place of "bob"). If the zombie was not successfully killed the message is: "Detected zombie process: 235. User: Alice. Could not kill"