11: More help for Santa

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Suppose you want to add some more functionality to the SleighTrack class we wrote in class. Each of the following should be instance methods you add to SleighTrack:

A. (1 point) Write a public boolean allVisited(Set<Location> locations) method that returns true iff the current SleighTrack instance has visited all of the given locations. (It is possible to do this one without using a for loop.)

B. (1 point) Write a public int mostPresents() method that returns the highest number of presents delivered to a single location in the current SleighTrack. (It is possible to do this one without a for loop, but you’ll need to read over the instance method of Map and the static methods of Collections to see how.)

C. (1 point) Write a public void presentsToCoal(Set<Location> locations) method that removes the given locations from the current SleighTrack, if they are in it. So mean! (It is possible to do this one without a for loop, but you’ll need to carefully read over the instance methods of Map to see how.)