www.wysiwygwebbuilder.com

I'm creating a site with 3 sizes, default, tablet and phone size (dunno pixels exactly yet).

I need to use a different image for my header and footer, which I have already selected.

I have a "master header" page, laid out as I want.

Would I make this master header responsive?
Or would I create 3 different master header pages? ( 1-Masterheader default 2-Masterheader tablet 3-Masterheader phone)

You can use one header and create different layouts for each breakpoint.