Given an array of strings, create a tree map with each string as a key and its corresponding value the number of letters in that string.

Complete the following file:

import java.util.Map; import java.util.TreeMap; public class MapUtil { /** Make a sorted map whose keys are the given words and whose values are their lengths. @param words an array of strings @return a map mapping strings to their lengths */ public Map<String, Integer> makeMap(String[] words) { ... } }