[5] 1. Answer the followings: a) True/False: Multiple threads can run concurrently in a single program. b) Write a code fragment that finds the largest integer in the following two- dimensional array. int[][] table = new int[10][10]; c) Suppose an sorted array contains 2050 elements. What are the least and the most numbers of comparisons for a successful search using binary search? d) What is the purpose of the instanceof operator? e) Must an abstract class include an abstract method