4. Construct proofs for the following theorems, starting with an assumption, not with the theorem itself, which is the conclusion you must reach, not the initial premise! (= Unit 9 - plus the rules from Units 7 and 8) [1 mark each]. a. (~ (p. q) = (sv r)) > (~ (p > ~s) > ~ q) b. p (p. (q v~q)) c. ((pq) (q> r)) v (r > p) d. ((pvq) (r. ~s)) (s ((t. w) > ~ p))

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A: Given-  To find- The postulate which justifies the statement AX+XC=AC.

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Q: 3. Use C.P. or I.P. or both to construct proofs for the following (= Unit 9 -plus the rules from…

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Q: h9HXth*x f3.1) he mt itextsS St ,2)

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A: Please refer the attached image for complete solution.THANK YOU !

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