int mystery(LLNode list) {    if (list.getLink() == null)       return list.getInfo();    else       return mystery(list.getLink()); } Group of answer choices returns 0.

19. Given the following linked list: LinkedList list = new LinkedList(); And this code: 1. list.add(1.5); 2. list.addFirst(11.3); 3. list.add(6.2); 4. list.add(3.4); 5. list.addLast(4.8); 6. list.add(7.4); 7. list.remove(1.5); 8. list.remove(3.4); 9. list.removeFirst); 10. System.out.println(list.getFirst(); Answer the following questions regarding the code: a) What is the list after line 6? b) What is the list after line 9? c) Line 10 gives what value?

JAVA plese Implement the indexOf method in the LinkedIntegerList class      public int indexOf(int value);        /**     * Returns whether the given value exists in the list.     * @param value - value to be searched.     * @return true if specified value is present in the list, false otherwise.     */ }     public static void main(String[] args) {        // TODO Auto-generated method stub        SimpleIntegerListADT myList = null;         System.out.println(myList);        for(int i=2; i<8; i+=2) {            myList.add(i);        } System.out.println(myList.indexOf(44));

Given the following class declaration: class List { public: List(); List(const List&); List& operator=(const List&); -List(); // Inserts element in the specified position, returns true if // it was able to insert. // Example, if the list is [4, 2, 1], and the user // calls list.Insert(6, 1) the list would become [4, 6, 2, 1] bool Insert(double element, size_t position) ; // Returns the position of element if found, if not found returns -1 int Index0f(double element)const ; // Removes the element in the given position double Remove(size_t position) ; // Gets the number in the given position double Get(size_t position)const ; // Returns a string representation of the list, elements // separated by commas and the list between brackets string ToString()const ; // Returns the number of elements in the list size_t Size)const; // Returns true if the list is empty, false otherwise bool IsEmpty)const; // Clears the whole list void Clear(); private: struct Node{ double number; Node* next; };…