To add two functions the questions are asking you develop: divideMid and divideAt.
 

4.(Dividing a linked list into two sublists of almost equal sizes)
a. Add the operation divideMid to the class linkedListType as follows:
void divideMid(linkedListType &sublist);
//This operation divides the given list into two sublist
//of (almost) equal sizes.
//Postcondition: first points to the first node and last
// points to the last node of the first sublist.
// sublist.first points to the first node and
//sublist.last points to the last node of the second
//sublist.
Consider the following statements:
unorderedLinkedList myList;
unorderedLinkedList subList;
Suppose myList points to the list with elements 34 65 27 89 12 (in this order). The
statement:
myList.divideMid(subList);
divides myList into two sublists: myList points to the list with the elements 34 65 27,
and subList points to the sublist with the elements 89 12.
b. Write the definition of the function template to implement the operation divideMid. Also
write a program to test your function.
 

5.(splitting a linked list, at a given node, into two sublists)
a. Add the following operation to the class LinkedListType:
void divideAt (LinkedListClass& secondList, const Type& item);
//Divide the list at the node with the info item into two sublists.
//Postcondition: first and last point to the first and last nodes of the first sublist.
// secondList.first and secondList.last point to the first
// and last nodes of the second sublist.
 

Consider the following statements:
 

UnorderedLinkedList myList;
UnorderedLinkedList otherList;
 

Suppose myList points to the list with the elements 34, 65, 18, 39, 27, 89, and 12 (in this order). The statement
 

myList.DivideAt(otherList, 18);
Divides myList into two sublists: myList points to the list with elements 34 and 65, and otherList points to the sublist with elements 18, 39, 27, 89, and 12.
b. Write the defintion of the funcction template to implement the operation divideAt. Also write a program to test your function.