How Array Insertion and Deletion Work
Inserting or deleting an element in an array can require moving the elements that follow it. Inserting at the front means shifting every existing element back by one, while inserting at the end doesn't require moving anything else. How many elements move depends on where you insert or delete.
GOAL
Explain how the number of elements moved by an array insertion or deletion depends on where it happens.
Inserting at the front of a 6-element array, how many elements need to move?