Discrete or continuous. In each of the following situations decide if the random variable is discrete or continuous and give a reason for your answer.
(a) Your Web page has five different links, and a user can click on one of the links or can leave the page. You record the length of time that a user spends on the Web page before clicking one of the links or leaving the page.
(b) The number of hits on your Web page.
(c) The yearly income of a visitor to your Web page.