Exercise 3. Consider a sentence = Vz (Q(z) vV 32Vy ((P(f(x), z) A Q(a)) V Vz R(y, z, g(x))))- 1. Draw its syntax tree. (5 marks) 2. List all the sub-formulas, terms, predicates, functions, and free variables in . (15 marks) 3. Specify a model for (a structure that satisfies ). This consists of a universe and interpretations of the predicates and the functions in the signature of the model. (15 marks)