You do not have to finish all the questions in one session. You can save the file, log off, come back later and restore the file. Once you have completed the entire exercise, you can then submit the file to the instructors for their evaluation.
To save your file, you have to provide a file name. In order to ensure that your file does not erase someone else's file, we want you to use this method of naming (and restoring) files. For this session, you should use the first part of your email address, immediately followed by the abbreviation "S1" for Session 1. For example, if your email is "email@example.com", you should use the name "bsmithS1" for this file name. For Session 2, you will use the name "bsmithS2", etc. Please do not save your files with clever names like "braille". You can RESAVE your work at any time by simply clicking again on the SAVE button.