Question: insert ( list 1 : DoublyLinkedList, key: int ) - > DoublyLinkedList: insert ( ) function accepts a doubly linked list of integers in ascending

insert(list1: DoublyLinkedList, key: int)-> DoublyLinkedList: insert() function accepts a doubly linked list of integers in ascending order and a key. Insert this key in this doubly linked list. Make sure all the elements in this list are still in ascending order after inserting this key. Return this doubly linked list. Test case: Before: list1: 13489, the key is 7. After: list1: 134789.

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