text: insert the following data
code: push ( & head , 9 ) ; push ( & head , 3 ) ; push ( & head , 5 ) ; push ( & head , 10 ) ; push ( & head , 12 ) ; push ( & head , 8 ) ; cout << " Doubly ▁ Linked ▁ List ▁ Before ▁ Sortingn " ; printList ( head ) ; insertionSort ( & head ) ; cout << " nDoubly ▁ Linked ▁ List ▁ After ▁ Sortingn " ; printList ( head ) ; return 0 ; }