2.16 points Suppose A,B, and C are sets. 2.1.1 Suppose also that AC=BC. Can we conclude that A=B ? Prove your answer, and clearly state what type of proof you are using. 2.1.2 Suppose instead that AC=BC. Can we conclude that A=B ? Prove your answer, and clearly state what type of proof you are using. 2.1.3 Suppose both AC=BC and AC=BC. Can we conclude that A=B ? Prove your answer, and clearly state what type of proof you are using