Given the resulting queue X from below, What would be the result of each of the following?
```
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));
a.) X.front();
b.) Y = X.dequeue();
c.) X.front();
d.) Y = X.dequeue();
e.) X.front();
``````
a) X.front() is not a valid method call. We should have called X.first(), which would return 8. Additionally, we need to store the returned value if we wish to use it later. The queue would remain unchanged.
b and c) As in part (a), we should have called X.first() instead of X.front(), and we need to store the returned value in a variable if we wish to use it later. The value of Y would be 8, a call to X.first() would have returned 2, and the queue would contain:
9 4 3 5 2
d) and e) As in part (a), we should have called X.first() instead of X.front(), and we need to store the returned value in a variable if we wish to use it later. The value of Y would be 2, a call to X.first() would have returned 5, and the queue would contain:
9 4 3 5
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