1. the preorder traversal of a binary tree is “a b c d e f g h i,” while its inorder traversal is “c d e b f a i h g.” draw the corresponding the tree.

2. for the set of keys {1,4,5,10,16,17,21} give the sequence of key insertions so the final tree has height 2, 3, 4, 5, and 6, respectively. how many comparisons need to be performed by the operation lookup(21) in each of these cases?

What is wi-fi infrastructure? a metropolitan area network that uses radio signals to transmit and receive data a communications technology aimed at providing high-speed wireless data over metropolitan area networks a means by which portable devices can connect wirelessly to a local area network, using access points that send and receive data via radio waves includes the inner workings of a wi-fi service or utility, including the signal transmitters, towers, or poles and additional equipment required to send out a wi-fi signal