Question 1. Using the truth table, determine whether the following two propositions are logically equivalent: Question 2. Using the truth table, determine whether the following two propositions are logically equivalent: Question 3. Show that the following argument is invalid. Question 4: (a) Using the truth table, show that the argument is valid (Modus Ponens or the method of affirming) (b) Using the truth table, show that the argument is invalid Question 5: (a) Using the truth table, show that the argument is valid (Modus Tollens or the method of denial) (b) Using the truth table, show that the argument is invalid Question 6: (a) Using the truth table, show that the argument is valid (Hypothetical Syllogism) P9 Question 7: Example 4.8 . What is the negatkn of the propo-itksn v:r c D. ,"(r)? Question 8. Show that