Consider three different raster systems with resolutions of 640 by 480, 1280 by 1024, and 2560 by 2048. Assuming 8 bits per byte, what size frame buffer (in bytes) is needed for each of these systems to store 12 bits per pixel? Assuming 8 bits per byte, what size frame buffer (in bytes) is needed for each of these systems to store 24 bits per pixel? [2] How long would it take to load a 640 by 480 frame buffer with 12 bits per pixel, if 105 bits can be transferred per second? How long would it take to load a 24 bit per pixel frame buffer with a resolution of 1280 by 1024 using this same transfer rate? [2] How much time is spent scanning across each row of pixels during screen refresh on a raster system with a resolution of 1280 by 1024 and a refresh rate of 60 frames per second