discrete mathmatics

2. Determine the truth value of each of these statements if the domain of each variable consists of all real numbers. If true, give a brief explanation for why. If false, give a counterexample (i.e. a set of values x,y that make the statement false. You must also explain why they make the statement false.) (4 points each) a) yx((y>x2)y>x) b) y!x(zy0)) d) xy(y>0x