Implement a public non$-$final class called Ferret. Ferret should provide a single constructor that takes a double, the length of that Ferret instance. You should also provide public getters and setters for the length following our usual convention: getLength and setLength. Ferret should not expose any of its internal state publicly.

Ferret should also implement Comparable comparing ferrets based on their length. As a reminder, first.compareTo$($Object second$)$ returns a positive int if first is larger than second, a negative int if first is smaller than second, and $0$ if they are equal. If second is null or not a Ferret you should also return a negative value.