Responsive banner adjustments

My responsive website is at Shophiy - [login to view URL] I need to know the exact areas within my site that I can place ad banners. You must ensure all the areas Identified are also viewable on mobile devices, "mobile friendly". Currently on the site you'll see under "about us", "contact us", & with in the "blog" ad banners, these will be removed. I just need to know the dimensions of these areas included with the areas you have identified. DO NOT use place holders, just determine the area and the dimensions, and they must be mobile friendly. Lastly, you'll see by clicking on the blog the "sendible" banner and as you scroll down it keeps repeating. I need this only to display once and I need to know if I can have multiple banners as you keep scrolling just like the sendible banner displays.