5. Find a counter example for each of the following statements, B = {2,3,...8,9}
a. $\forall x \in B, x + 5 < 12$
b. $\forall x \in B, x$ is prime
6. Determine the truth value of the following statements, where A = {1,2,3}
a. $\exists x \forall y, x^2 < y + 1$
b. $\forall x \exists y, x^2 + y^2 < 12$