Create a class called Cat that implements the Comparable interface. Cat should provide a public constructor that takes a single double argument that sets that cat's age. You should assert that the provided age is not negative. You should order cats based on their age. Specifically, compareTo should return:

• -1 if this cat is younger than the passed cat
• 0 if this cat is the same age as the passed cat, or if the passed value is not a Cat
• 1 if this cat is older than the passed cat

As a reminder, the Comparable interface comprises a single method: int compareTo(Object other).