a) The following C++ function performs a mysterious operation on a list. Trace the execution of the code below and write the output. What does the function return? Explain the operation performed on the list. ("head" is the pointer which points to the first node in the linked list.) head } 5 int mysterious 1() { 3 } node *temp = head; int counter = 0; 20 18 while(temp !=NULL) { Sout < data