Four games of Clue were played. In one game Miss Scarlet used the wrench, but not in the library. In another game the rope was used in the study, but not by Colonel Mustard. During one game the gun was used in the conservatory, while in another game Professor Plum was not to be found in the library. Colonel Mustard was never in the conservatory and Mrs. White never used the rope. The lead pipe may or may not have been used in the kitchen. Determine who used what and where.