Which of the following are true about MATLAB variables? Canvas Note: For "multiple answer" questions, Canvas adds points for correct answer deducts points for incorrect answers. It is important, therefore, to make sure you sele correct choicels) and only the correct choice(s); when in doubt, it might be advantageous to omit any answers you are unsure of. May contain any special symbols, including those such as t or $ Must begin with a letter May contain letters or numbers May end with a letter