Tree Node and Subtree Deletion by Index

google Given a tree in the form of parent index and value, tree = [(-1, 'a'), (0, 'b'), (0, 'e'), (1, 'c'), (1, 'd'), (2, 'f'), (2, 'g')]. Delete the node at the given index. Delete the entire subtree of the node at the given index. Example Input tree = [(-1, 'a'), (0, 'b'), (0, 'e'), (1, 'c'), (1, 'd'), (2, 'f'), (2, 'g')] index_to_delete = 1