2. Here is an array which has just been partitioned by the first step of Quicksort: (1)(500) Which of these elements could have been the pivot? (if there are more (2) (5%) If we use the same array and use Randomize Quicksort to improve the A 2, 0, 1, 3, 4, 7, 6, 5. 8) than one possibility, list them all) sorting process, explain and show an example of how it is improved