I need help answering:

1. Based on the implementation below, does switching from a LinkedList to an ArrayList make sense? Why or why not? answer here 2. If you were implementing a Queue with a singly linked list, would it be better to add to the front and remove from the back, or add to the back and remove from the front? Does it matter? Why/why not? answer here 3. What methods from the JCF ArrayList would you use to implement ..push( ) and for a Stack