A developer needs to create a Visualforce page to override the standard New Contact Button. The page contains a field of for capturing the Contact's daytime preferred Phone number. The user has the option to select one of the four available phone types (Mobile, Home, Work, or Other) to be the primary contact number. Only if the "Other" Phone Type option is selected, the page must display a text box for the User to provide the other Phone number. How can this requirement be met