I am confused on this question

You are almost finished updating a web site. as part of the update, you have converted all pages from html 4.0 to html5. the project is currently on schedule. however, your project manager has been asked by the marketing team manager to justify a day of time spent validating the site's html5 pages. the marketing team manager does not have technical knowledge of the internet or the web. which is the most appropriate explanation to provide to the marketing team manager?

Octothorpe is another name for what common computer keyboard symbol?

Write python code that prompts the user to enter his or her age and assigns the user’s input to an integer variable named age.