Let X and Y be sets, let C and 0 be any subsets of Y and le F te a tunction from X to Y, Prove that F1(CD)=F1(CF1(D). Fart 1: Proof that F1(CD)F1(C)F1(D) : Cemider the sentences in the folowing sorambled att br delinitien at by atefinilion of Wr iefination of br defention of ty detration of the thichen.