(10 pts) Assuming that we have defined an "ArtavList x " to hold integers. Obviously, x is empty at the beginning. Answer the questions below: 3.1. How do you define the ArrayList object x ? Please give the entire Java statement. 3.2. If the answer you used in 3.1 includes keyword "Arrautist Integer > ", please explain why you use "Integer" instead of "int". If the answer you used in 3.2 includes keyword "Arravtist