Requirements: You are to design and build a zoo organizer. The zoo organizer should keep track of a set of animals. The zoo organizer should be able to keep track of different sets of animals. The organizer only needs one set of animals open at a time. It should have the capabilities to save the current set of animals to a file and also open a set from a file. There are 3 types of animals in the zoo. There are mammals, reptiles and birds. All animals have a name, a birthdate, an age and a species. The following chart shows the species that the organizer needs to track. It only needs to track these species.