Queues - General Questions

Starting with an empty queue: enqueue(2), enqueue(2), dequeue(), enqueue(6), dequeue(), enqueue(1), enqueue(7). Which element is at the front?

Starting with an empty queue: enqueue(7), dequeue(), enqueue(5), enqueue(9), enqueue(3), enqueue(4), enqueue(7). Which element is at the front?

Starting with an empty queue: enqueue(5), enqueue(9), enqueue(2), enqueue(5), dequeue(), enqueue(2), enqueue(8). Which element is at the front?

Starting with an empty queue: enqueue(6), enqueue(3), enqueue(8), dequeue(), enqueue(6), dequeue(), 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?