4 a plane has a solid background and a transparent has a see through 5 gif is best suited for pictures with large areas of the same color jpeg is more visually appealing because it is loaded in layers 7 1 bpp = 2 colors 4 bpp = 16 colors 8 bpp = 265 colors 16 bpp = 32768 colors 8 simplify graphics, divide up large pages, use thumbnails, reuse images 9 minimize the home server's load put everything in the same directory a place for everything and everything in its place 10 if it doesn't recognize the image format or if it cannot find the image 11 top, middle, bottom, left, right, center 12 align="CENTER" tag and tag 14 download time, A/V impairment of users, speed 15 give credit where it is due and get permission first