If OxyContin is addictive, then either the pharmaceutical industry has stopped making it or thousands of patients are becoming addicted to it. The pharmaceutical industry has not stopped making OxyContin. Also, OxyContin is addictive. Therefore, thousands of patients are becoming addicted to it. (O, P, T)

Translate the following arguments into symbolic form and use the first four rules of inference to derive the conclusion of each. The letters to be used for the simple statements are given in parentheses after each exercise. Use these letters in the order in which they are listed.