(Section 3.3 problems 26,28) Section 01 only does part (a); section ZG81 does parts (a) and (b).

Each statement in 2528 refers to the Tarski world of Figure 3.3.1. For each, (a) determine whether the statement is true or false and justify your answer, (b) write a negation for the state- ment (referring, if you wish, to the result in exercise 24).

a. circles x and triangles y, x is above y.

b. atrianglexandasquareysuchthatxisaboveyandx and y have the same color.