A priority queue containing characters is implemented as a heap stored in an array. The precondition states that this priority queue cannot contain duplicate elements. There are 10 elements currently in the priority queue, as shown below. What values might be stored in array positions 7-9 so that the properties of a heap are satisfied?
![235_b374571a-9428-44eb-bc5e-b58e1a2bd6fa.png](https://secure.tutorsglobe.com/CMSImages/235_b374571a-9428-44eb-bc5e-b58e1a2bd6fa.png)