Write the following functions: a): merging two ordered singly linked lists of integers into one ordered list. b): concatenating two lists p1 and p2. c): checking whether two singly linked lists have the same contents. 1) Write 3 functions: Number Linked List merge (Number Linked List p1, NumberLinkedList p2) Number Linked List concatenate2Lists (Number Linked List p1, NumberLinked List p2) bool equal (NumberLinked List p1, Number Linked List p2) 2) Write operations for NumberLinked List class void merge (Number Linked List); void concatenate (Number LinkedList); bool equal (Number Linked List);