Below is the proof for the following argument using rules of inference: pAs q→ (s Ar) 1 pAs Hypothesis 1 2 s- 4 Hypothesis 2 3 9 (s Ar) Hypothesis 3 4 P Simplification, 1 Simplification, 1 Modus Ponens, 2, Modus Ponens, 3, 7 ??? 8 r Simplification, 7 Which of the following is the correct missing line? O s Ar O s - r

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