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Question 1 Produce the main container using the following specifications: a) The page must have a breaking point at 768px (desktop/mobile). b) In the narrow version, the container must cover the entire screen. In the large version, the container must have a maximum width of 960px and be horizontally centered. c) The narrow version must use the image named bg-small as a background, and the large version bg-big >> d) The main container must integrate a fixed header of 80px high with black background and white text