- a function `canTreat` that will receive a string as an argument and will return a boolean indicating if the string is present in the veterinary `animalKnowledge` array,
- a function `respondClient` that will receive two string, the pet name and the animal species of the pet, and will return a string that will include `Yes` or `No` plus the pet name depending on whether the pet can be treated or not, as in the example below.