Final answer:
This question is about implementing functions in a C program for a linked list of contacts.
Step-by-step explanation:
The subject of this question is Computers and Technology at a High School level. The question is asking for the completion and implementation of functions in a C program for a linked list of contacts. The student is required to define a struct ContactNode with data members for contact name, phone number, and a pointer to the next node. They also need to implement functions to initialize a contact node, retrieve the name and phone number, insert a new node after a given node, retrieve the next node, and print the details of a contact node.