Consider the queues \(Q_1\) containing four elements and \(Q_2\) containing none (shown as the Initial State in the figure). The only operations allowed on these two queues are Enqueue(\(Q\), element) and Dequeue(\(Q\)). The minimum number of Enqueue operations on \(Q_1\) required to place the elements of \(Q_1\) in \(Q_2\) in reverse order (shown as the Final State in the figure) without using any additional storage is
