I just finished writing a program that I can add, remove or print objects to a list, but I am having difficulty implementing two more functions

that is insert_back, which inserts a value to the end of a list. Also,I have to modify the representation of a List and alter whatever methods are necessary to make insert_back run in constant time: O(1).

This new operation should have the signature:

void List::insert_back( const Object& data );

Also, isIncreasing, For example, for a list containing head-() (11) (8) (15) (3), isIncreasing() should return false. However, it would return true when working on a list containing head- () (7) (9) (15).

This new operation should have the signature:

bool List::isIncreasing() const;

Thank you