1. Please provide a natural deduction proof for the following valid, deductive argument:Premise 1: ÿ~ ( F & A )Premise 2: ÿ~ ( L v ~ A )Premise 3: ÿD > ( F v L ) ÿ ÿ ÿ ÿ ÿ ÿ ÿ/ ~ D2. Answer the following question: ÿcan one invalidity with the natural deduction proof method? ÿWhy or why not?3. Answer the following the question: ÿcan one construct a natural deduction proof for an invalid argument in SL? ÿWhy or why not?

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