The 12 shapes in the Venn diagram shown to the right are described by the attributes of shape, size, and color. Let C, H, and T denote the respective sets of circular, hexagonal, and triangular shapes. Similarly, let S, L, R, U and B denote the sets of small, large, red, and blue shapes. The set A contains the shapes that are small and not a triangle, so A = SNT. Complete parts (a) through (d) below. (a) Express small circles in symbolic form. A. Snc OB. CUSUS OC. CUS allin cadat