use the interface and tester provided

For this assignment you are to use NetBeans to implement the interface named ListOfString_Interface provided with this assignment. Below are additional details for this assignment. Details 1. Your class must be named SLinked_ListOfString. 2. It must implement the interface ListOfString_Interface. 3. The class for the singly linked list nodes must be named SNode_String. 5. Your class must have exactly three instance variables (no more, no less): a. An SNode_String object referencing the head of the linked list. b. An SNode_String object referencing the tail of this linked list. c. An int to hold the size of the list. 6. Your class must have a single constructor that sets the head and tail nodes to null and sets the size to zero. 7. Your class must include all the methods specified in the ListOfString_Interface. See the comments provided in the interface for details on what each method is supposed to do. You can also look at the HTML documentation generated from the Javadoc comments. 8. The interface methods that your class implements must all include the @0verride annotation. Tester Program You are being provided with a Tester program, called ListOfString_Tester. If your SLinked_ListOfString class is working correctly it will print a message indicating that all tests were passed, otherwise error messages will be printed