Q 4 Answer

---

Your partner has overcalled spades so should have 5 cards and 10 points. You have 17 HCPs and if your partner has one diamond you have a fit and can add shortage points. You are not vulnerable so 5 diamonds.

Your partner has repeated hearts so has 6 cards in the suit. You now have a fit and can add shortage points and so should go to 4H.

This is difficult as you have 16 HCPs and your partner has not bid. You are vulnerable so you should probably PASS.

You have 10 HCPs and cannot bid 2H over 2C (as you would be promising 5 cards), so you should DBL promising both majors, even though you only have 3 cards in spades.

Your partner has been forced to bid their best suit but may not have many points. As you do not have 16 points you should PASS.

Your partner has done a Takeout double after SOUTH's 1D. They have a maximum of 2 hearts and a minimum of 3 of the other suits and ask you to call your best suit. NORTH has responded with 1H so you do not have to bid. However you have 9 HCPs (you should only bid if you have >8 HCPs) but you do not have a stopper in hearts so cannot bid 1NT. You should bid 2C.