Fig. 2 The first expansion (design 2) creates 4 copies of the original. Within each circle is a Migure isometric to the original. The sculpture consists of a solid red Prustrum of a cone with iron rods bal- pneed to form a design of five squares nnected at their vertices with balls. These squares are contained within a Marger 3 x 3 square. The 3 x 3 square is ot complete because four rods are miss- ing. These missing rods give the struc- Rure an open quality. For the purposes of the following uestions, suppose that the iron rods at form the small square are 1 unit in length. Suppose that the sculptor wanted No extend the sculpture but still maintain the open quality. One possible way is Shown in figures 1-4. 1. (a) How many 1-unit rods does design 1 contain? See figure 1. (b) Some of the squares are closed. What is the total area of the closed squares? (c) Find the total area of the large square that contains design 1. (d) What is the ratio of the closed area to the total area for design.