Inserted 6 integers, list y should be 1 2 3 4 5 6
Size of y = 6
Capacity of y = 8
Ouput using forward iterators pre and post ++
1  2  3  4  5  6  
1  2  3  4  5  6  
Ouput using backward iterators pre and post --
6  5  4  3  2  1  
6  5  4  3  2  1  
Incremented by 1 list is 2  3  4  5  6  7  
The reversed list is 7  6  5  4  3  2  
The sum of the elements is 27