Answer: nine ways to map 1:1 See slides 20, 21 and 22: http://images.slideplayer.com/9/2645248/slides/slide_20.jpg http://images.slideplayer.com/9/2645248/slid

Answer: nine ways to map 1:1 See slides 20, 21 and 22: http://images.slideplayer.com/9/2645248/slides/slide_20.jpg http://images.slideplayer.com/9/2645248/slides/slide_20.jpg