Writing programs to solve the Programming Projects helps to solidify your understanding of the material and demonstrates how the chapters concepts are applied. (As noted in the Introduction, qualified instructors may obtain completed solutions to the Programming Projects on the publishers Web site.) 2.1 To the HighArray class in the highArray.java program (Listing 2.3), add a method called getMax() that returns the value of the highest key in the array, or 1 if the array is empty. Add some code in main() to exercise this method. You can assume all the keys are positive numbers