Pass 5 points
Anything else 0
Discretion calls for a pass. If there were any assurance that two diamonds would be the final contract, a resounding double would be in order. But it is reasonable to expect that if you doubled, there would be a rescue bid, and that your partner, looking to you for certain high-card values, would take some step distasteful to you, such as doubling the rescue. You would not contribute very much to the defeat of that other contract.
Seven spades 5 points
Six diamonds 3 points
Six hearts 2 points
Six spades 1 point
On the basis of your partner's strong bidding there can be little doubt that the trump suit is solid. It will be observed that North bypassed an easy chance to show the ace of diamonds so that it may be assumed that he hasn't got that card. This makes it all the more convincing that you are not faced with a trump loser. So a grand-slam bid in spades is quite in order.
Pass 5 points
Three diamonds 2 points
Two spades or two no trump 1 point
There is no reason to foresee game possibilities, and there is no action you can take at this point that is not fraught with danger. Partner has been brought into the auction, perhaps much against his will, and he may have little or nothing. A bid of two spades would be bad tactics, and a call of two no trump would be the act of a man who looks upon currency with complete disdain.