1. Consider the argument form where p and q represent propositions: -p> -4P :: pva a) Construct a truth table for the above with premises and conclusion. The columns of the truth table should be clearly labelled. Show the premises and the conclusion. (5 marks) b) Determine whether this form of argument is valid or invalid. Explain how the truth table supports your answer. (2 marks) 2. A set of premises and a conclusion are given below. Use the rules of inference to deduce the conclusion from the premises, giving a reason for each step. Assume all variables are statement variables. (5 marks) (p 19) T-S os "pvna