Tree Traversals (15 points) Consider the following binary tree (not satisfying the BST property) and a visit operation that prints the contents of a node. COMP.1020 Computing II UMASS - Lowell Exam 2 Spring 2021 6 14 7 4 11 13 17 53 A. Give the output for a preorder traversal calling visit. B. Give the output for an inorder traversal calling visit. C. Give the output for an postorder traversal calling visit.

Which group on the home tab allows you to add shapes to a powerpoint slide?

Write a method so that the main() code below can be replaced by the simpler code that calls method original main(): public class calcmiles { public static void main(string [] args) { double milesperhour; double minutestraveled; double hourstraveled; double milestraveled; milesprhour = scnr.nextdouble(); minutestraveled = scnr.nextdouble(); hourstraveled = minutestraveled / 60.0; milestraveled = hourstraveled * milesperhour; system.out.println("miles: " + milestraveled); } }

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?