Using the given BST, list the elements of the resulting tree in breadth-first order after applying each of the following operations: (a) insert keys 35 and 23 (b) delete key 20 using delete-by-copying method and using the predecessor of this key (c) delete key 36 using delete-by-mergeing method and by merging to the left subtree.   Note: apply operation (b) on the tree resulting of (a), and apply operation ( c) on the tree resulting of (b)

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