Which statements are true about Deque? $($Choose three$)$

Implementations of ArrayDeque will auto$-$expand.

Null values are not allowed.

If the deque is empty, pool and peek operations throw an exception.

peekFirst$($T$)$ and peekLast$($T$)$ returns and removes the element at the head or tail of the Deque.

offerFirst$($T$)$ and offerLast$($T$)$ insert elements at the head and the tail of the deque.