The Node class used in the generic implementation of the class ListReferencebased in this...

The Node class used in the generic implementation of the class ListReferencebased in this chapter assumed that it would be declared package-private; hence, the data fields were declared for package access only.

a. Suppose that the data fields were declared private. Write accessor and mutator methods for both the item and next fields.

b. Give at least three different examples of how the code in the ListReferencebased implementation would have to be changed.