Queues - General Questions

Starting with an empty queue: enqueue(8), dequeue(), enqueue(1), dequeue(), enqueue(8), enqueue(9), dequeue(). Which element is at the front?

Starting with an empty queue: enqueue(9), dequeue(), enqueue(4), enqueue(2), dequeue(), enqueue(6), dequeue(). Which element is at the front?

Starting with an empty queue: enqueue(6), dequeue(), enqueue(2), enqueue(1), enqueue(2), enqueue(5), enqueue(3). Which element is at the front?

Starting with an empty queue: enqueue(3), dequeue(), enqueue(1), enqueue(2), enqueue(5), enqueue(5), enqueue(7). Which element is at the front?

Starting with an empty queue: enqueue(1), enqueue(4), enqueue(4), enqueue(8), enqueue(4), enqueue(3), dequeue(). Which element is at the front?