5. Write a Java Method. (20 points) a. (15 points) Complete the method double highLowaverage(int[ ] a) below to return the average of the largest element and the smallest element found in the array, a. The values in a [ ] can be any integer values. You may assume that a [ ] has at least two elements in it. public static double highLowAverage(int[ ] a) ( b. (5 points) Using Big-O notation, give the time complexity of your method in part (a) above and briefly explain. View answer and explanation V Q N Total