... what each statement in the unknown2Sub() function does duringthe call in which parameter p points to the node containing a . In particular,what role does the fact that p is passed using call ... during thecall in which parameter p points to the node containing a . In particular, howare the links to and from this node changed as a result of this call?Step 5: What is the significance ... keys of the data items in a binary search tree. The keys are output in ascending order, one per line.void clear ()Requirements:NoneResults:Removes all the data items in a binary search tree.bool...