Using the class queue in the Standard Template Library, defi ne and test the class OurQueue that is derived from QueueInterface. The class queue has the following methods that you can use to defi ne the methods for OurQueue: queue: $//$ Default constructorbool empty$0$ const; $/$ Tests whether the queue is emptyvoid push$($const ItemType& newEntry$)$; $//$ Adds newEntry to the back of the qu void popO; $//$ Removes the front of the queueItemType& front: $//$ Returns a reference to the front of the queue