Question: Design the operation HeapDecreaseKey, which, given a pointer to a vertex of the heap and a new key value smaller than the original one, sets

Design the operation HeapDecreaseKey, which, given a pointer to a vertex of the heap and a new key value smaller than the original one, sets the key value of that vertex to the new value. Afterwards, use this operation to design the operation HeapDelete, which, given a pointer to a vertex of the heap, deletes this vertex from the heap.

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