Quiz #4 (on null constituents) will be done on line over Friday, 9 March - Sunday, 11 March.  You should have received an email linking you to the request form to get the quiz.  When you are ready to take the quiz, click on the link in your email, fill out the form and download the quiz.  It will be in docx format so you should be able to type directly on the quiz.  You will have an hour to complete the quiz and then just put it in the class dropbox.  Feel free to email it to me as well if you'd like.  It must be completed by midnight on Sunday, 11 March.