Hand trace a queue X through the following operations:
X.enqueue(new Integer(4));X.enqueue(new Integer(1)); Object Y = X.dequeue();X.enqueue(new Integer(8));X.enqueue(new Integer(2));X.enqueue(new Integer(5));X.enqueue(new Integer(3)); Object Y = X.dequeue();X.enqueue(new Integer(4));X.enqueue(new Integer(9));
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