Question $9 $ Determine the truth value of each of these statements if the domain of each variable consists of all real numbers. a) $\exists x\left(x^{2}=2 ight) $ b) $\exists x\left(x^{2}=-1 ight) $ c) $\forall x\left(x^{2}+2 \geq 1 ight)$ d) $\forall x\left(X^{2} eq x ight) $ CS.PB.008