It seems that Pakistan will keep playing till tea break today where they can declare their inning. What we are going to see after this break time, is fats and quick game by Pakistani players to take the runs over 500 marks before invite West Indian team to start their 2nd inning which will be final innings.
I dont think they will play the second session completely and i think they will bat one more hour after the lunch and play bit more agreesively and they will declare after taking a lead of 500 runs because its already a huge lead and they will declare after that for sure.