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(c) Let f : X Y be a function from X to Y. Consider the following statement: For all subsets C and D of Y,1(CnD")=f-1(C)nif 1(D)]c. This statement is (0) True and equivalent to: For all subsets C and D of Y, f- (C-D) = f-1 (C)-/-1 (D) f (C- D)-f(C)-f-(D) f-1 ( [f-1(DJF f-1 (C-D) = f-1 (C)-[f-1 (D)]c f-1(C- D)f(C)]-f(D) (1) False and equivalent to: For all subsets C and D of Y (2) True and equivalent to: For all subsets C and D of Y, C-D) f-1 (C)- (3) False and equivalent to: For all subsets C and D of Y, (4) True and equivalent to: For all subsets C and D of Y