In the center of a piece of graph paper draw a figure that fits in a 15 block by 20 block rectangle. On a second piece of graph paper draw another figure with a 2:1 ratio of the first that also fits in the 17=5 block by 20 block rectangle. On a 3rd piece of graph paper draw another figure similar to the 1st figure but with a 3:5 ratio that will also fit in the 15 block by 20 block perimeter. How big should the figures be?