1. Find the complete truth table of the following: a) (p = q) var q) b) (p +r)^(q r) c) (p Vq) r d) Determine if the previous statements contain tautology, contradiction, contingency or logical equivalent statement(s). If so, identify which is which. 2. Translating the following sentence to a propositional logic. You can scan for virus and cannot upgrade your system when you reboot your computer." 3. Find the output of each of the combination circle. 9 4. Let P(x) denotes a statement x2 > 0", U is all real number. Find the truth value of the following and give an explanation. a) 3xP(x) b) VxP(x)