You are South, you hold this hand ♠ AT95 ♥ QT94 ♦ AJ74 ♣ 4 The bidding is like this 1NT-(4♣)-? North opens with 1NT, East bids 4♣, now what will you bid? 4♣ promises at least 8+♣ What will you bid in this situation: (1) all are non-vul (2) only NS are vull (3) all are vul?