Can anyone help me with this coding?

Prompt users to enter their name. Then display "Welcome !" somewhere on your page.
Prompt users to enter their age. Then display a message box that states whether or not they are old enough to enter your site.
Provide a button when clicked displays an image somewhere on the web page.
Provide another button, when clicked, removes or hides the image.
Provide a hyperlink that displays an alert box when the mouse hovers over the it.