5,7,8

Determine whether each argument in Problems 5-8 is valid or invalid. Give reasons for your answer. b. p - q 5. a. p- q ~ q ..P :.~p b. p V q 6. a. p V q ~ q ~ p ..P :.q b. p - q 7. a. p - q P ~P b. ~ p - q 8. a. p-~q -P :.q .. ~P