Write a method that takes a Map as a parameter and returns a new Map in which keys and values are swapped. Throw an exception if there are duplicate values in the map that is passed as a parameter. For this problem, you will write and include code in your submission document. (You do not actually have to do this on a computer, but you may do so if it increases your confidence that your code is correct.) You will (probably) need to refer to the Javadoc documentation of java.util.Map to complete this problem.