Question: Write a method for concatenating two doubly linked lists L and M , with header and trailer sentinel nodes, into a single list L .

Write a method for concatenating two doubly linked lists L and M, with header and trailer sentinel nodes, into a single list L. Write a main method to test the new method. Hint: Connect the end of L into the beginning of M. explainthoroughly each line of code what is hapening and ehy?

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