3. (4 points) Consider the following compound propositions: (p - Q) and (p - 9). Illustrate using a truth table how we can determine if they are logically equivalent. Are they logically equivalent? Section 1.4 4. (4 points) Determine the truth value of each of these statements if the domain of of each variable consists of all real numbers. a) Vx (x">x) b) VX (x0) c) 3x (x + 6 = 12) d) 3x (x? +6 > 12)