Question: 3. Rewrite the following arguments symbolically and determine the validity of each. (a) If John graduates he gets the job. John docs not get

3. Rewrite the following arguments symbolically and determine the validity of each.

3. Rewrite the following arguments symbolically and determine the validity of each. (a) If John graduates he gets the job. John docs not get the job. Therefore John does not graduate. (b) If Mary wears the green hat she leads the band. Mary does not wear the green hat. Therefore Mary does not lead the band. (c) Either Fred will sing or the cat will bark. The cat won't bark. Therefore Fred will sing.

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