template typename SinglyLinkedList::Iterator SinglyLinkedList::insertAfter{ const Iterator & position, const Data_t & element) { new Node = 2 .); if( { 5 = new Node; tail = 6 } else if( == nullptr) { new Node->_next = 8 10 } else if 11 == tail) { tail->_next = 13 12 14 } else { 15 16 17 18 } ++_size; return 19 } [ Choose] position tail element position->_next head newNode newNode->_next tail->next new Node Node * head->next nullptr size() empty()