7.2 a) Write a generic method public static <...> Collection> sortPairCollection(Collection > col) in a Utils class that takes as parameter a collection of Pair objects and returns a new collection object (use ArrayList<...>) with the pair elements from collection col sorted in ascending order. For comparing pairs, the K type must implement Comparable<> Use the proper type constraints. b) Write a main() function in Utils. java that tests the sortPairCollection() with K