.Help with multiple choice:

1. Suppose that items A, B, C, D and E are pushed, in that order, onto an initially empty stack S. S is then popped four times; as each item is popped off, it is inserted into an initially empty queue. If two items are then removed from the queue, what is the next item that will be removed from the queue?

2. If the binary tree below is printed by a preorder traversal, what will the result be?

3. Given the array of integers arr shown below

Suppose that items A, B, C, D and E are pushed, in that order, onto an initially empty stack S. S is then popped four times, as each item is popped off, it is inserted into an initially empty queue. If two items are then removed from the queue, what is the next item that will be removed from the queue? B. C. tem A Item B item C Item D item E E. 2. If the binary tree below is printed by a preorder traversal, what will the result be? 9 4 16 12 A. B. C. D. E. 9 4 17 16 12 11 6 9 17 6 4 16 22 12 69 17 4 16 22 12 6 17 22 9 4 16 12 6 17 9 4 22 16 12 3. Given the array of integers arr shown below 19 66 12 48 6 23| 39| 2 | 18 what is the output of the following statements? int[] a2 = arr; a2 [3] = arr[2]; arr[2] = arrf31: arr[3] = a2[31 System.out.println(arr[2] + " " + arr[3]); 6 12 12 6 6 6 12 12 none of the above E