The Koala constructor accepts a parameter for the maximum number of food that Koala will eat in its lifetime $($the number

of times it will return true from a call to eat$).$ For example, a Koala constructed with a parameter value of $8$ will return

true the first $8$ times eat is called and false after that. Assume that the value passed is non$-$negative.

The toString method for a Koala returns the number of times that a call to eat would return true for that Koala. For

example, if a new Koala$(4)$ is constructed, initially its toString return $"4".$ After eat has been called on it once, calls

to toString return $"3",$ and so on$,$ until the Koala is no longer hungry, after which all calls to toString return $"0".$

You can convert a number to a string by concatenating it with an empty string. For example, $""+7$ makes $"7".$