1. One implementation of the LIST ADT Insert new node before current and new node becomes current (assume new node created) node newNode = new node; head current

2. One implementation of the LIST ADT head current prev = head; while (prev->next != current) prev = prev->next; prev

3. One implementation of the LIST ADT head current prev = head; while (prev->next != current) prev = prev->next; prev

4. One implementation of the LIST ADT head current node newNode = new node; prev->next = newNode; prev newNode

5. One implementation of the LIST ADT head current node newNode = new node; prev->next = newNode; newNode->next = current; prev newNode

6. One implementation of the LIST ADT head current node newNode = new node; prev->next = newNode; newNode->next = current; current = newNode; prev newNode

7. One more implementation of the LIST ADT Circular single linked list tail Start function. current = tail->link;

8. One more implementation of the LIST ADT Doubly linked list head current Insert new node before current and new node becomes current (assume new node created) node newNode = new node;

9. One more implementation of the LIST ADT Doubly linked list head current newNode->prev=current->prev; newNode

10. One more implementation of the LIST ADT Doubly linked list head current newNode->prev=current->prev; newNode->next=current; newNode

11. One more implementation of the LIST ADT Doubly linked list head current newNode->prev=current->prev; newNode->next=current; newNode->prev->next = newNode; newNode

12. One more implementation of the LIST ADT Doubly linked list head current newNode->prev=current->prev; newNode->next=current; newNode->prev->next = newNode; current->prev = newNode; newNode

13. One more implementation of the LIST ADT Doubly linked list head current newNode->prev=current->prev; newNode->next=current; newNode->prev->next = newNode; current->prev = newNode; current = newNode; newNode