for which of the following predicates is ∀x∀y∃z q(x, y, z) true? assume the domain of quantification for all variables is the real numbers. a. Let Qlx, y, z) be the statement "(x) = z = x= vz)." b. Let Olx, y, z) be the statement "xy = z." c. Let Q(x, y, z) be the statement "(xyz = x(yz)." d. Let Q(x, y, z) be the statement "x=y=z."
