With a few questions? 2. what was the historical significance of spacewar! on the pdp-1? what technological advance did the pdp-1 have over older punch card computers that made spacewar! possible? 3. why do the aliens in the original space invaders game get faster as you destroy more of them? 4. how do raster graphics, used with crt technology, work? what kinds of images does this create? 5. how do vector graphics used with crt technology work? list at least one of vector graphics’ advantages over raster graphics, and name one classic (70s and 80s) game that used vector graphics.