I need help writing a linked link program in C++. I need a header file as well if you could add that that would be cool. I struggle with them. Specify and implement an ADT (Abstract Data Type) character string by using a linked chain of characters (i.e. a linkedlist that stores characters). In addition to any necessary Constructors, Accessor and Mutator methods, include the following operations: 1. Find the length 2. Test whether one string is equal to another Make sure test your code (write a test program) and include all necessary files, including your test program, in a .zip (or .rar) archive that you submit for grading..