Position positionAtIndex $($int i$)->$ take in a Position object, get its index in the list

Traverse the linked list with a counter until you match the index. Check for valid indices.

indexAtPosition$($Position pos$)->$ Traverse the linked list with a counter until you

make the position input, return the index.

E get $($int i$)->$ Use the sub$-$class $($LinkedPositionalList get function$)$ getter using

positionAtIndex

E set$($int I, E e$)->$ Use the sub$-$class $($LinkedPositionalList set function$)$ setter using

positionAtIndex

Add $($int i$,$ E e$)->$ add a position in the list

Remove $($int i$)->$ remove the position$/$element at index I

Run the main $($no need to modify$)$ of SequenceTester.java to compare results, they

should be identical for both types of sequence.