Please read the instructions before solving the problem:

****For each proof, you must include (i.e., write) the premises in that proof. I do not want to see any proofs without premises. YOU CANNOT USE CONDITIONAL PROOF (CP), INDIRECT PROOF (IP), and ASSUMED PREMISES (AP). Additionally, use only the 18 rules of inference found in the text and in the notes. You will lose points if you use any of the inference rules Resolution, Contradiction, Transposition, Idempotence and Identity.****

(1) 1. (A. B) R 2. A 3. CD-R/:. ~ ( CB)