Mock Test Logic Games Logic and Reasoning Problems Set C

Here’s one more set of logic games. Remember, mapping out the game using all the given information is the most efficient way to attack this type of question.
Five roommates—Randy, Sally, Terry, Uma, and Vernon—each do one housekeeping task— mopping, sweeping, laundry, vacuuming, or dusting—one day a week, Monday through Friday.
Vernon does not vacuum and does not do his task on Tuesday.
Sally does the dusting, and does not do it on Monday or Friday.
The mopping is done on Thursday.
Terry does his task, which is not vacuuming, on Wednesday.
The laundry is done on Friday, and not by Uma.
Randy does his task on Monday.
What task does Vernon do?