a) The colors on your computer screen are specified using what is called the RGB Color Model. In this model, red, green, and blue colored light are combined in a given pixel to create a color for that pixel. Each of the colors red, green, and blue have 256 different possible shades. How many possible colors are there for a given pixel? If each pixel can be a different color in the RGB model, how many different possible color pictures of this size are there?