Java Stacks and Queues quiz need help~

Deque cQueue = new ArrayDeque();

cQueue.offer('A');

cQueue.offer('B');

cQueue.offer('C');

cQueue.offer('D');

System.out.println( cQueue.peek( ) ); //what will be printed?

cQueue.offer('E');

cQueue.offer('F');

cQueue.poll( );

cQueue.poll( );

System.out.println( cQueue.peek( ) ); //what will be printed?

cQueue.poll( );

cQueue.poll( );

cQueue.offer('G');

System.out.println( cQueue.peek( ) ); //what will be printed?

System.out.println( cQueue.size( ) ); //what would print?