B D dogs turtles ferrets rabbits cats birds N gerbils mice snakes pigs Last week, there were several types of animals at a local animal shelter. Let U be the set of the types of animals at the shelter last week. During the week, some of the animals were treated by the veterinarians on staff. Let B be the set of animal types that were treated by Dr. Brown. Let D be the set of animal types that were treated by Dr. Dean. Let N be the set of animal types that were treated by Dr. Nelson. Use the Venn diagram to get your answers below. Consider this set (which is written in descriptive form): The set of animal types that were not treated by Dr. Nelson, but were treated by Dr. Brown or Dr. Dean birds cats dogs (a) Which of these is a correct way to write the set? ON'U(BUD) ON'n (BND) ON'N (BUD) ON'U (BND) ferrets gerbils snakes (b) Write the set in roster form. mice pigs rabbits turtles