Thank you so much for your help @congthien. Both solutions seem to have worked! The only issue now is that there is now a white bar above the footer. It seems that the background image is being cropped? Is there any way to force the image to fill the entire background area?
An additional question- the company logo is currently situated in the sidebar to the right of the page and disappears as the page scrolls down. Is there any way to float it to the left of the navigational menu without inserting it as the website’s logo (which causes the entire header to take up half the screen)? Thanks again for your help